köken: Borrowed from Medieval Latin ad Deum (“to God”). Compare Aragonese, Asturian, Extremaduran, and Spanish adiós, Catalan adeu, Dutch ajuus, English, French, and Occitan adieu, German tschüss, Greek αντίο (antío), Galician adeus, Italian addio, Maltese addiju, Mirandese adius, Romanian adio, Serbo-Croatian ади̏о/adȉo, Slovene adȋjo.
Ukraynacaв то́й же ча́с, до зу́стрічі, до поба́чення, до́сі, нара́зі, побачимось
Hintçeअलविदा, फिर मिलते हैं, फिर मिलेंगे, बाद में मिलेंगे, विदा /əl.ʋɪ.d̪ɑː/
bye, goodbye
çekim: çoğul अलविदाएँ
köken: Borrowed from Classical Persian اَلوِدَاع (alwidā'), an unadapted borrowing from Arabic الوَدَاع (al-wadāʕ), whence also विदा (vidā, “departure”). Cognate with Turkish elveda.
hi (greeting) · hey (to get someone's attention) · bye (often repeated twice: hei hei)
köken: From Proto-Finnic *hei (compare Estonian hei, Ingrian hei, Karelian hei, Ludian hei, Veps hei). Compare also Old Norse hei (whence Swedish hej) and English hey.
Vietnamcabai, bái bai, chào, chào nha, gặp lại sau nhé, hẹn gặp lại /t͡ɕaːw˨˩/
to greet, salute, say hello or goodbye to
köken: Non-Sino-Vietnamese reading of Chinese 朝 (“to meet; to meet a senior person; to attend the emperor's audience”, SV: triều). Doublet of chầu and triều. (Nguyễn Văn Khang. Từ ngoại lai trong tiếng Việt, 2007) False cognate of Italian ciao, which also means both "hello" and "goodbye".