intention; purpose
用 · 5 strokes
Depicts a bucket with a handle on the right side. Based on the original meaning "bucket". The meaning of this character has shifted over time and now means "use".
意 · 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.)