From Old French cul, from Latin cūlus, from Proto-Indo-European *kuH-l-, zero-grade without s-mobile form of *(s)kewH- (“to cover”).

tchu m (plural tchuls)

1. (Jersey, nautical) stern

• noeuds en tchu d'poulain
• tchu d'l'an (“last day of the year”)

• IPA^(key): /ˈtxu/
• Rhymes: -u
• Syllabification: tchu

tchu

1. genitive/dative/locative/vocative singular of dech

• tchu in Polish dictionaries at PWN