exchange / convert / dui (one of the trigrams of the I Ching: swamp, west)

exchange; swap; give-and-take / (mathematics) commutation

to exchange

a meaning; a significance; a point / meaning; definition

to mean, signify, imply

意味: a meaning, a significance, the point / 異味: strange or different flavor

a letter or character (symbol for a sound or a word) / (linguistics) script, writing system / (specific to Japanese) a written mora, a kana / writing in general, written words

a letter, a character (symbol for a sound or a word) / (linguistics) script, writing system / (specific to Japanese) a written mora, a kana / writing in general, written words

(cryptography) key exchange - an exchange of peers' keys at initialization phase of connection.

(mathematics) commutative law