let down

also preposition to lower

to fail to fulfil the expectations of (a person); disappoint

to undo, shorten, and resew (the hem) so as to lengthen (a dress, skirt, etc)

to untie (long hair that is bound up) and allow to fall loose

to deflate

a disappointment

the gliding descent of an aircraft in preparation for landing

the release of milk from the mammary glands following stimulation by the hormone oxytocin