Answer: ratcheted

AnswerCrossword Clue
RATCHETEDDecreased gradually, with "down"
RATCHETEDMoved by degrees in one direction only
RATCHETEDIncreased by degrees
ratchetedRATCHET, to move by a ratchet mechanism, also RACHET
ratchetedOperate by means of a ratchet
ratchetedCause something to rise (or fall) as a step in what is perceived as a steady and irreversible process
ratchetedMake a sound like a ratchet