Meaning of IN in English

IN

n.

Variant: or il- or im- or ir-

Function: prefix

Etymology: Middle English, from Anglo-French, from Latin, from in in, into

1 : in : within : into : toward : on ― usually il- before l < il luviation>, im- before b, m, or p < im mingle>, ir- before r < ir radiance>, and in- before other sounds < in filtrate>

2 : 1 EN- < im brute> < im peril> < in spirit>

Merriam Webster Collegiate English Dictionary.      Merriam Webster - Энциклопедический словарь английского языка.