Meaning

noun the periodic rise and fall of the sea level under the gravitational pull of the moon

noun something that may increase or decrease (like the tides of the sea)

noun there are usually two high and two low tides each day

originEtymology tree Proto-Indo-European *deh₂-der. Proto-Indo-European *deh₂y- Proto-Indo-European *-tis Proto-Indo-European *déh₂itis Proto-Germanic *tīdiz Proto-West Germanic *tīdi Old English tīd Middle English tyde English tide Inherited from Middle English tyde, from Old English tīd, from Proto-West Germanic *tīdi, from Proto-Germanic *tīdiz, from Proto-Indo-European *déh₂itis, from *deh₂y- +…

Etymology from Wiktionary, CC BY-SA 3.0