== Ancient Greek == === Etymology === From -τος ‎(-tos, verbal adjective suffix) +‎ -ικός ‎(-ikós, adjective suffix), occurring in some original case and later used freely. === Pronunciation === === Suffix === -τῐκός • ‎(-tikós) ‎(feminine -τῐκή, neuter -τῐκόν) Added to verbal stems to form adjectives: relating to, suited to, skilled in, able to, -ive ==== Usage notes ==== Certain sound changes happen before the suffix, as before other derivational or inflectional suffixes in τ ‎(t). For instance, labial stops β, π, φ ‎(b, p, ph) become π ‎(p), dental stops δ, θ, τ ‎(d, th, t) beco...