-isco

Probably ultimately from Proto-Germanic *-iskaz.

• IPA^(key): /ˈisko̝/

-isco (adjective-forming suffix, feminine -isca, masculine plural -iscos, feminine plural -iscas)
-isco m (noun-forming suffix, plural -iscos, feminine -isca, feminine plural -iscas)

1. -ish

• No longer productive. Was appended to roots denoting names of nations or regions.

• alemanisco
• francisco
• greguisco
• mourisco
• tartarisco
• torquisco

A form of the infix -isc-, from Latin -ēscō. Cognates include Romanian -esc, Spanish -ezco.

-isco (non-lemma form of verb-forming suffix)

1. used with a stem to form the first-person singular present of most regular -ire verbs

• -isci
• -isce

• Cois, Cosi, Scio, Soči, cosi, cosi', così, osci, scio, sciò, scoi, soci

-īscō (present infinitive -īscere, perfect active -ī, supine -um); third conjugation

1. Alternative form of -escō

-iscō

1. dative/ablative masculine/neuter singular of -iscus

-isco (adjective-forming suffix, feminine -isca, masculine plural -iscos, feminine plural -iscas)

1. Alternative form of -sco; forms adjectives that signify "relation" to the word stem; sometimes pejorative

   ‎mar (“sea”) + ‎-isco → ‎marisco (“seafood”)

-isco m (noun-forming suffix, plural -iscos)

1. Alternative form of -sco; forms augmentative nouns
2. Alternative form of -sco; forms collective nouns

• “-isco”, in Diccionario de la lengua española, Vigésima tercera edición, Real Academia Española, 2014