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.
Practica a expresión oral e a memorización de " tidal " e moitas outras palabras e frases inglés .