Definition from Wiktionary, a free dictionary

Latin

Etymology

From Ancient Greek -ικος, akin to English -ish and -y, German -isch and -ig, and various suffixes in other Indo-European languages.

Pronunciation

• (Classical) IPA: /ˈ-i.kus/

Suffix

-icus m. (feminine -ica, neuter -icum); first/second declension

1. Belonging to.
2. Derived from.
3. Of or pertaining to; connected with; -ish.

Usage notes

The suffix -icus is added to a noun, adjective, verb, etc., to form an adjective.

Examples:

ūnicus (“‘single, unique’”) < ūnus (“‘one’”)

amīcus (“‘loving, friendly’”) < amō (“‘I love’”)

gallicus (“‘Gallic, Gaulish’”) < Gallia (“‘Gaul’”)

Inflection

Synonyms

• -ānus, -ēnsis

Descendants

• English: -ic
• Spanish: -ico