What is the meaning of Im-?

Expressing negation; not.

Alternative form of the prefix em-, itself variant of en-.

Form used before a root beginning with the letter b, m, or p of in-

the indirect object of an active transitive verb

the subject of an intransitive affective verb

the direct object of a small set of transitive verbs mostly dealing with affect, communication and intimacy

indicates possession of a noun

round, round about

repeatedly, over again, re-

in another way

to the ground, down, over

Class 9 noun prefix; form of in- used before stems beginning with a labial consonant.

you, thou (second-person, singular, subject proclitic pronoun)

your, thy (second-person, singular, possessive pronoun)

Alternative form of nim-

Class 9 noun prefix; form of in- used before stems beginning with a labial consonant.

a form of the prefix in-, used before b, m and p

about, around, peri-

great, very

Alternative form of in-

Alternative form of in-

im-, en-

a form of the prefix in-, used before b and p

a form of the prefix in-, used before b and p

Class 9 noun prefix; form of in- used before stems beginning with a labial consonant.

Class 9 noun prefix; form of in- used before stems beginning with a labial consonant.

Source: wiktionary.org