plumb

Adjective

• exactly vertical
  • the tower of Pisa is far out of plumb
    

Adverb

• exactly
  • fell plumb in the middle of the puddle
    

• conforming to the direction of a plumb line

• completely; used as intensifiers
  • clean forgot the appointment
    
  • I'm plumb (or plum) tuckered out
    

Noun

• the metal bob of a plumb line

Verb

• adjust with a plumb line so as to make vertical

• examine thoroughly and in great depth

• weight with lead

• measure the depth of something

Related words

• Synonyms: 
  plum , clean , plumb bob , plummet