to swim

colour, hue

vivid / skillful / colorful

a sea, an ocean / a lake / (figuratively) an object covering over a large area, as in 血の海 (chi no umi, “pool of blood”) or 火の海 (hi no umi, “sea of fire”)

bear

a bear (large mammal of family Ursidae) / (slang) hairiness in general; (more specifically) a bear, an otter (a hairy man, especially one who is gay)

prefixed to other nouns for animals or plants to indicate large size or great strength, relative to other varieties

inside

中々: very, quite, considerably, rather, by no means (with negative verb)

very, quite, considerably, rather / by no means (with negative verb)