(Saga) very

The hiragana syllable こ (ko). Its equivalent in katakana is コ (ko). It is the tenth syllable in the gojūon order; its position is か行お段 (ka-gyō o-dan, “row ka, section o”).

(mathematics) coprime (having no factors in common)

a mythical creature said to emerge from the sea and predict either good harvest or epidemic disease