The document contains a list of words beginning with "un-", "im-", "il-", or "ir-" that have generally negative connotations such as being improper, lacking, or deficient in some way. Many of the words suggest something is impossible, inadequate, or inappropriate. The list encompasses terms relating to deficiencies of maturity, mobility, morality, reasoning, legality and more.

1. Un Im IlIr
Irrecoverable
Irregular
Irrelevant
Irreparable
Irreplaceable
Unattended
Unauthorized
Unavailable
Unavoidable
Unconscious
Unforeseen
Unforgivable
Unnecessary
Immature
Immobile
Immoral
Impatient
Improbable
Immeasurable
Illegal
Illegible
illiterate
illogical