plumb

To plumb a body of water, you measure its depth. To plumb a house, you connect all of its pipes. To make carpentry plumb, you get it exactly vertical.

Originally, the verb plumb only meant “to measure the depth of water.” These days, if you “plumb the depths” of something, you go in deep for knowledge and experience: your Heidegger seminar may plumb the depths of German Existentialism like Jacques Cousteau plumbed the depths of the ocean.

PRIMARY MEANINGS OF: plumb

1
adjnadvv
exactly vertical
the metal bob of a plumb line
conforming to the direction of a plumb line
adjust with a plumb line so as to make vertical
2
v
measure the depth of something
3
adv
completely; used as intensifiers
FULL DEFINITIONS OF: plumb
1

adj exactly vertical

“the tower of Pisa is far out of plumb
Synonyms
perpendicular, vertical
at right angles to the plane of the horizon or a base line

n the metal bob of a plumb line

Synonyms:
plumb bob, plummet
Type of:
bob
a hanging weight, especially a metal ball on a string

adv conforming to the direction of a plumb line

v adjust with a plumb line so as to make vertical

Type of:
adjust, correct, set
alter or regulate so as to achieve accuracy or conform to a standard

v weight with lead

Type of:
burden, burthen, weight, weight down
weight down with a load
2

v measure the depth of something

Type of:
measure, quantify
express as a number or measure or quantity

v examine thoroughly and in great depth

Type of:
explore
examine minutely
3

adv completely; used as intensifiers

Synonyms:
clean, plum

adv exactly

“fell plumb in the middle of the puddle”
Synonyms:
plum
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