耻 is a bound form — it rarely appears alone in modern Chinese. Common compounds: 耻辱 (chǐrǔ, disgrace), 可耻 (kěchǐ, shameful), 无耻 (wúchǐ, shameless), 羞耻 (xiūchǐ, shame).
history
Confucius considered 耻 (shame) a key moral concept — a person who feels shame will correct their behavior. The saying 知耻近乎勇 ('knowing shame is close to courage') is from the Classic of Rites.
