let down
verb
High School
1
To allow to descend.
2
To disappoint; to betray or fail somebody.
3
To lengthen by undoing and resewing a hem.
4
To reduce one's level of effort.
5
To soften in tempering.
6
To thin; to reduce the thickness or viscosity of.
7
Used other than figuratively or idiomatically: see let, down.