任意 (rèn yì)
any; arbitrary; at will; at random
Character breakdown
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任 (Rén) · 6 strokes
Phonosemantic compound. 亻 represents the meaning and 壬 represents the sound.
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意 (Yì) · 13 strokes
Thought (意) is the sound (音) that comes from the mind (心). (Oversimplified for brevity. The 音 component in this character has a complicated history.)