emphasis

While the emphasis, or main focus, for walking a dog might be on "answering the call of nature," the emphasis for the dog might be on chasing squirrels.

If you say emphasis a little louder or with extra oomph in your pronunciation, you are putting emphasis on the word. This emphasis makes it clear that special attention, or emphasis, should be given to the word. Now, having repeated emphasis so many times, the "s" sound really stands out, sort of like in the word "stress." When you stress a point, you put emphasis on something — it is the main thing, the emphasis.

Definitions of emphasis
1

n intensity or forcefulness of expression

“his emphasis on civil rights”
Synonyms:
vehemence
Types:
overemphasis
too much emphasis
Type of:
intensity, intensiveness
high level or degree; the property of being intense

n special importance or significance

“the red light gave the central figure increased emphasis
Synonyms:
accent
Types:
focus, stress
special emphasis attached to something
Type of:
grandness, importance
a prominent status

n special and significant stress by means of position or repetition

Types:
topicalization
(linguistics) emphasis placed on the topic or focus of a sentence by preposing it to the beginning of the sentence; placing the topic at the beginning of the sentence is typical for English
Type of:
rhetorical device
a use of language that creates a literary effect (but often without regard for literal significance)

n the relative prominence of a syllable or musical note (especially with regard to stress or pitch)

Synonyms:
accent, stress
Types:
show 4 types...
hide 4 types...
accentuation
the use or application of an accent; the relative prominence of syllables in a phrase or utterance
pitch accent, tonic accent
emphasis that results from pitch rather than loudness
word accent, word stress
the distribution of stresses within a polysyllabic word
sentence stress
the distribution of stresses within a sentence
Type of:
inflection, prosody
the patterns of stress and intonation in a language

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