勇気
ゆうき · yuuki · JLPT N3 · noun
courage
🦁 勇 brave + 気 spirit = courage; yuuki sounds like you-key
勇 means brave or daring, and 気 is spirit or energy, also seen in 元気 (genki). So a brave spirit is courage. For the sound, yuuki is close to you-key: courage is the key you carry into a hard moment.