Unplumb

noun
1.
a small mass of lead or other heavy material, as that suspended by a line and used to measure the depth of water or to ascertain a vertical line.
Compare plumb line.
adjective, Also, plum.
2.
true according to a plumb line perpendicular.
3.
Informal. downright or absolute.
adverb, Also, plum.
4.
in a perpendicular or vertical direction.
5.
exactly, precisely, or directly.
6.
Informal. completely or absolutely:
She was plumb mad. You’re plumb right.
verb (used with object)
7.
to test or adjust by a plumb line.
8.
to make vertical.
9.
Shipbuilding. horn (def 32).
10.
to sound with or as with a plumb line.
11.
to measure (depth) by sounding.
12.
to examine closely in order to discover or understand:
to plumb someone’s thoughts.
13.
to seal with lead.
14.
to weight with lead.
15.
to provide (a house, building, apartment, etc.) with plumbing.
verb (used without object)
16.
to work as a plumber.
Idioms
17.
out of / off plumb, not corresponding to the perpendicular; out of true.
noun
1.
a weight, usually of lead, suspended at the end of a line and used to determine water depth or verticality
2.
the perpendicular position of a freely suspended plumb line (esp in the phrases out of plumb, off plumb)
adjective
3.
(prenominal) (informal, mainly US) (intensifier): a plumb nuisance
adverb
4.
in a vertical or perpendicular line
5.
(informal, mainly US) (intensifier): plumb stupid
6.
(informal) exactly; precisely (also in the phrase plumb on)
verb
7.
(transitive) often foll by up. to test the alignment of or adjust to the vertical with a plumb line
8.
(transitive) to undergo or experience (the worst extremes of misery, sadness, etc): to plumb the depths of despair
9.
(transitive) to understand or master (something obscure): to plumb a mystery
10.
to connect or join (a device such as a tap) to a water pipe or drainage system
plumb