Answer: plumb

AnswerCrossword Clue
PLUMBMake vertical
PLUMBDownright.
PLUMBMake a depth sounding
PLUMBDelve deeply
PLUMBLead used for sounding
PLUMBTake a sounding
PLUMBFishline sinker
PLUMBTake soundings
PLUMBProbe into
PLUMBKind of line
PLUMBDepth checker
PLUMBWater-depth measurer
PLUMBWeight that sounds like a fruit
PLUMBDiscover the facts of.
PLUMBWater depth measurer
PLUMBGet to the bottom of
plumbexactly
plumbto determine the depth of
plumbvertically
plumbcompletely
plumbnot corresponding to the perpendicular; out of true
plumbto examine closely
plumbto test by a plumb line
plumbperpendicular
plumbsmall weight suspended by a line (plumb line) and used to measure depth or to ascertain a vertical line
PLUMBVertical direction indicator
PLUMBMeasure the depth of
PLUMBPerfectly vertical
PLUMBDownright
PLUMBVertical
PLUMBVertical determinant
PLUMBMeasure depth, in a way
PLUMBLead weight
PLUMBEve of "The Brady Bunch"
PLUMBAbsolutely, or absolutely vertical
PLUMBCarpenter's gadget
PLUMBPerfectly perpendicular
PLUMBPerpendicular
PLUMBExactly vertical
PLUMBStraight down