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>