The hiragana syllable ち (chi). Its equivalent in katakana is チ (chi). It is the seventeenth syllable in the gojūon order; its position is た行い段 (ta-gyō i-dan, “row ta, section i”).

New Tokyo International Airport (TYO), currently named Narita International Airport)

(onomatopoeia) hastily, impetuously

(organic chemistry) nonadecane