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.
To frustrate, disappoint, and overthrow.
To (cause to) separate and go in different directions; to disperse.
Of a pitcher: to keep down the number of hits or walks.
To deflect (radiation or particles).
To occur or fall at widely spaced intervals.
To distribute loosely as by sprinkling.
To be dispersed upon.
The act of scattering or dispersing.
A collection of dispersed objects.