To decompress (data) that was previously deflated.
To enlarge an object by pushing air (or a gas) into it; to raise or expand abnormally
To swell; to puff up.
To enlarge by filling with air (or a gas).
To disappoint; to betray or fail somebody
To reduce one's level of effort.
To soften in tempering.
Used other than figuratively or idiomatically: see let, down.
To allow to descend.
To lengthen by undoing and resewing a hem.