English
macrotide
From macro- + tide.
Proto-Indo-European *meh₂ḱ- ‘to increase’
Proto-Indo-European *mh₂ḱrós ‘lean, meager’
Proto-Hellenic *makrós
Ancient Greek μακρός ‘long’
English macro-
Proto-Indo-European *deh₂y- ‘to share, divide’
…
Proto-Germanic *tīdiz ‘time’
Proto-West Germanic *tīdi ‘time’
Old English tīd ‘time in general’
Middle English tyde ‘a time (period), season’
English tide
Today it means
noun A relatively large tide
Language periods are conventional ranges, not dates for this word.
Etymograph / macrotide