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

to introduce oneself

Machu Picchu (ancient Incan city and archaeological site in Peru)

腹筋: do sit-ups