Your clothes are loose if they are too big for you. The opposite of loose is tight. The woman in the picture is wearing jeans that are far too loose for her because she has lost weight.
Lost is the past tense of lose. If you do not know where you are, you are . If you do not know where something is, it is lost. The people in the picture are lost in the woods.
The opposite of lost is found.
Something is loud if it makes noise that has a high volume and can be heard clearly a long way away.
Things that are loud include jet engines, many kinds of machinery, and some parties.
