Relating to tides.
From tide + -al. Probably a hybrid formation within English. Alternatively it might be from an unattested British Medieval Latin *tīdālis, derived from rare tīda, from Old English tīd. The usual Latin word for “tidal” is aestuālis.
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Esercitati a parlare e a memorizzare " tidal " e molte altre parole e frasi in inglese .