-icus

From Latin -icus.

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-icus

1. -ic or -ician

From i-stem + -cus, occurring in some original cases and later used freely. Cognate with Ancient Greek -ικός (-ikós), Proto-Germanic *-igaz (Old High German and Old English -ig, Gothic -𐌴𐌹𐌲𐍃 (-eigs)), Sanskrit -इक (-ika), Proto-Slavic *-ьcь (the last has fossilized into a nominal agent suffix, but probably originally also served adjectival functions).

• (Classical) IPA^(key): /i.kus/, [ɪkʊs̠]
• (modern Italianate Ecclesiastical) IPA^(key): /i.kus/, [ikus] (stressed on the antepenult)

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

1. belonging to
2. derived from
3. of or pertaining to; connected with; -ic, -ish

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

Examples:

‎ūnus (“one”) + ‎-icus → ‎ūnicus (“single, unique”)

‎amō (“I love”) + ‎-icus → ‎amīcus (“loving, friendly”)

‎Gallia (“Gaul”) + ‎-icus → ‎gallicus (“Gallic, Gaulish”)

‎metallum (“metal”) + ‎-icus → ‎metallicus (“metallic”)

First/second-declension adjective.

• -ānus, -ēnsis

• -ticus
  • -āticus