What is the Latin word for approximation?

The usual Latin words for “approximation” are appropinquātiō, accēdō. The right choice depends on the sense; see the distinctions below.

English → Latin

“approximation” in Latin

appropinquātiōan approach, a drawing near (in time)accēdōto go or come toward, approach, reach; to advance, attack; to be added, join

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

approximation

appropinquatio: accessus. [Vid: APPROACH]. To be an approximation to anything, (prope) accedere ad aliquid; non multum abesse ab aliqua re.

Quick answer

What is the Latin word for approximation?: The usual Latin words for “approximation” are appropinquātiō, accēdō. 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.