plumb

/plʌm/
adverb
  1. Exactly; completely; straight (used informally for emphasis).
    • The arrow landed plumb in the center of the target.
    • He ran plumb into the fence and got a scratch on his arm.
    • She stood plumb in the middle of the doorway, blocking the way.
verb
  1. To measure or test with a plumb line; to make vertical.
    • The builder plumbed the door frame before securing it.
    • She plumbed the fence posts to ensure they stood straight.
    • We need to plumb this wall before we install the cabinets.
  2. To explore or understand deeply; to get to the bottom of something.
    • She plumbed her own feelings to understand why she was so upset.
    • The detective tried to plumb the mystery of the missing painting.
    • Scientists plumb the depths of the ocean to discover new species.
  3. To connect or install pipes for water or gas.
    • They plumbed the entire building for natural gas.
    • He learned how to plumb a sink during his apprenticeship.
    • The contractor plumbed the new house with copper pipes.
Synonyms
noun
  1. A small weight (often made of lead) attached to a line, used to find the exact vertical direction (a plumb line).
    • The carpenter dropped the plumb to check if the wall was straight.
    • The old plumb was made of brass and hung from a thin string.
    • He used a plumb to make sure the post was perfectly vertical.
adjective
  1. Exactly vertical; straight up and down.
    • The tower is not plumb; it leans slightly to the left.
    • The surveyor confirmed that the foundation was perfectly plumb.
    • Make sure the shelf is plumb before you nail it to the wall.
  2. Complete; absolute (used informally for emphasis).
    • He fell plumb asleep in the middle of the movie.
    • That idea is plumb crazy!
    • It's plumb impossible to finish this puzzle in five minutes.
Antonyms
What does "plumb" mean? | whatsthatwordmean | whatsthatwordmean