"inferior, cheap material," 1962 (in song "Little Boxes" by U.S. political folk-singer Malvina Reynolds, 1900-1978), reduplication of tacky. As an adjective by 1967.
ticking
tickle
tickled
ticklish
tick-tack-toe
ticky-tacky
Ticonderoga
tidal
tidbit
tiddlywinks
tide
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