iso.
big, large, great (of a great size)
Meaning & usage
big, large, great (of a great size)
isoympyrä
big, grown-up
olet jo iso poika
great (powerful; important; influential)
Iso-Britannia
grand (standing in the second or more remote degree of parentage)
isoisä
isoäiti
capital, uppercase, majuscule
iso kirjain
Where this word comes from
From isä (“father”) + -o, through an earlier form isoi (attested in Agricola). SSA considers this word 'primarily western (Finnish)', although SMS remarks it is common in all dialect regions except Central and South Karelia. First attested as jso in c. 1401. The original senses probably were “father” as a noun, thence “big, grown-up, adult” as an adjective.
synonym of isä (“father”)
main; ellipsis of isopurje (“mainsail”)
Where this word comes from
From isä (“father”) + -o, through an earlier form isoi (attested in Agricola). SSA considers this word 'primarily western (Finnish)', although SMS remarks it is common in all dialect regions except Central and South Karelia. First attested as jso in c. 1401. The original senses probably were “father” as a noun, thence “big, grown-up, adult” as an adjective.
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Definitions, grammatical labels, IPA, etymology and examples: Wiktionary contributors, extracted by Kaikki / Wiktextract. Adapted under CC BY-SA 4.0. Selected fields and authored examples are shown; third-party quotations and audio are omitted. See contributor history.
Last enriched 2026-09-10. Definitions are in English. Romanizations are shown when supplied by the source; syllable estimates are omitted for unsupported scripts.