What is the Latin word for decrescent?

The usual Latin words for “decrescent” are dēcrēscō, senēscō. The right choice depends on the sense; see the distinctions below.

English → Latin

“decrescent” in Latin

dēcrēscōto grow less or shorter, decrease, wane, dwindle; to vanish, fade, disappear, pass away by diminution senēscōto become aged, grow old, age; to decay or diminish in strength, grow weak, weaken; waste away, wane, decline, dwindle;

Riddle & Arnold A Copious and Critical English–Latin Lexicon, 1864

decrescent

decrescens (decreasing): senescens (growing old: luna tum senescens, tum crescens).

Quick answer

What is the Latin word for decrescent?: The usual Latin words for “decrescent” are dēcrēscō, senēscō. The right choice depends on the sense; see the distinctions below.

Entry from J. E. Riddle & T. K. Arnold, A Copious and Critical English–Latin Lexicon (rev. C. Anthon, New York: Harper, 1864), digitised by Fergus J. P. Walsh, CC BY-SA 4.0; Latin markup adapted by latindictionary.co.