c. 1200, allgate "all the time, on all occasions," mid-13c. "in every way," probably from the Old Norse phrase alla gotu (see all + gate (n.) "a way"). With adverbial genitive -s from late 14c. Compare always).
alleviate
alleviation
alley
alleyway
all-fired
allgates
alliance
allied
alligator
all-in
all-inclusive