An uninhibited person does or says what they want, without the little brake inside that stops most of us — no shyness, no worrying about what people will think. It describes dancing, laughing, talking, singing: 'uninhibited laughter', 'an uninhibited dancer'. The feeling of the word is usually warm and admiring, especially about children, artists, and people enjoying themselves; English speakers often half-envy this quality. But it has a second life too. Because the brake it names is partly the brake of modesty, 'uninhibited' is frequently used about sex and about people who have been drinking, and in those contexts it can carry a hint of 'perhaps too free'. So the same word can be a compliment or a gentle warning, and only the sentence around it tells you which. It comes from 'inhibited', a word from psychology meaning held back by your own fears — so the picture behind it is of something inside you letting go of the rope.