Difficult words starting with S-I

Activities for this list:

definitions & notes only words
  1. sentient
    endowed with feeling and unstructured consciousness
  2. scad
    any of a number of fishes of the family Carangidae
  3. stint
    supply sparingly and with restricted quantities
  4. sequester
    keep away from others
  5. slapdash
    marked by great carelessness
  6. sate
    fill to contentment
  7. sinuous
    curved or curving in and out
  8. sift
    move as if through a sieve
  9. sordid
    foul and run-down and repulsive
  10. surfeit
    indulge (one's appetite) to satiety
  11. slur
    utter indistinctly
  12. snicker
    laugh quietly
  13. sacrilegious
    grossly irreverent toward what is held to be sacred
  14. strut
    walk with a lofty proud gait
  15. sham
    something that is a counterfeit; not what it seems to be
  16. sophist
    someone whose reasoning is subtle and often specious
  17. scurrilous
    expressing offensive reproach
  18. saunter
    walk leisurely and with no apparent aim
  19. sleeper
    an unexpected achiever of success
  20. soothsayer
    someone who makes predictions of the future
  21. Stygian
    dark and dismal as of the river in Hades
  22. smug
    marked by excessive complacency or self-satisfaction
  23. stolid
    having or revealing little emotion or sensibility
  24. scabbard
    a sheath for a sword or dagger or bayonet
  25. sallow
    unhealthy looking
  26. stultify
    deprive of strength or efficiency; make useless or worthless
  27. sunder
    break apart or in two, using violence
  28. surmise
    infer from incomplete evidence
  29. scurry
    move about or proceed hurriedly
  30. seminal
    containing seeds of later development
  31. servitude
    state of subjection to an owner or master
  32. spruce
    any coniferous tree of the genus Picea
  33. sinecure
    a job that involves minimal duties
  34. spurious
    plausible but false
  35. sheathe
    enclose with a protective covering
  36. solicitous
    full of anxiety and concern
  37. sublime
    worthy of adoration or reverence
  38. silt
    mud or clay or small rocks deposited by a river or lake
  39. sophistry
    a deliberately invalid argument in the hope of deceiving
  40. smother
    deprive of oxygen and prevent from breathing
  41. scintillate
    emit or reflect light in a flickering manner
  42. slipshod
    marked by great carelessness
  43. swill
    drink large quantities of
  44. smirk
    smile affectedly or derisively
  45. stalwart
    having rugged physical strength
  46. shack
    move, proceed, or walk draggingly or slowly
  47. sere
    having lost all moisture
  48. stoop
    bend one's back forward from the waist on down
  49. sanguine
    confidently optimistic and cheerful
  50. seethe
    foam as if boiling
  51. sadistic
    deriving pleasure from inflicting pain on another
  52. sidereal
    of or relating to the stars or constellations
  53. suffragist
    an advocate of the extension of voting rights
  54. sloth
    a disinclination to work or exert yourself
  55. skirmish
    a minor short-term fight
  56. scourge
    something causing misery or death
  57. spawn
    the mass of eggs deposited by fish or amphibians or mollusks
  58. straggle
    wander from a direct or straight course
  59. saturnine
    bitter or scornful
  60. scrupulous
    characterized by extreme care and great effort
  61. sleazy
    morally degraded
  62. suffuse
    cause to spread or flush or flood through, over, or across
  63. snub
    refuse to acknowledge
  64. stentorian
    very loud or booming
  65. spartan
    unsparing and uncompromising in discipline or judgment
  66. substantiate
    establish or strengthen as with new evidence or facts
  67. stricture
    severe criticism
  68. spangle
    adornment consisting of a small piece of shiny material
  69. slither
    pass or move unobtrusively or smoothly
  70. secrete
    place out of sight; keep secret
  71. sensuous
    taking delight in beauty
  72. shirk
    avoid one's assigned duties
  73. sterile
    incapable of reproducing
  74. scaffold
    a temporary arrangement erected around a building
  75. sepulcher
    a chamber that is used as a grave
  76. supercilious
    having or showing arrogant superiority to
  77. squander
    spend thoughtlessly; throw away
  78. satirical
    exposing human folly to ridicule
  79. stifle
    impair the respiration of or obstruct the air passage of
  80. seemly
    according with custom or propriety
  81. sear
    become superficially burned
  82. stodgy
    excessively conventional and unimaginative and hence dull
  83. stockade
    fortification consisting of a fence set firmly for defense
  84. smolder
    burn slowly and without a flame
  85. sectarian
    of or relating to a subdivision of a larger religious group
  86. sodden
    wet through and through; thoroughly wet
  87. sagacious
    acutely insightful and wise
  88. smelt
    small trout-like silvery marine or freshwater food fish
  89. spasm
    a painful and involuntary muscular contraction
  90. spasmodic
    occurring in spells and often abruptly
  91. stanch
    stop the flow of a liquid
  92. sherbet
    a frozen dessert made primarily of fruit juice and sugar
  93. subjugate
    make subservient; force to submit or subdue
  94. subsistence
    a means of surviving
  95. sanguinary
    accompanied by bloodshed
  96. swarthy
    naturally having skin of a dark color
  97. supposition
    the cognitive process of conjecturing
  98. scintilla
    a tiny or scarcely detectable amount
  99. secession
    formal separation from an alliance or federation
  100. slovenly
    negligent of neatness especially in dress and person

Sign up, it's free!

Whether you're a student, an educator, or a lifelong learner, Vocabulary.com can put you on the path to systematic vocabulary improvement.