An Etymological Dictionary of Astronomy and Astrophysics
English-French-Persian

1) Nearly exact or correct; near or approaching a certain state, condition, or goal.
2) (v.tr.) To come close to; be nearly the same as.
(v.intr.) To come near or close, as in degree, nature, or quality.

From L. approximatus, p.p. of approximare "to draw near to," from ad- "to" + proximare "come near," from proximus "nearest," superlative of prope "near".

1) Nazdin from nazd "near" + -in, adjective making suffix, in particular superlative, as in bišin, kamin, kehin, mehin, etc.
2) Nazdinidan from nazdin, as above, + -idan infinitive forming suffix.

Not exactly, but nearly or roughly.

Adverb of → approximate.