lost speed (verb) relax: diminish, lessen
Sinonime: beat, beat-down,
blue, caved-in, come-apart,
crestfallen, dashed, daunted,
depressed, deterred, dismayed, dispirited,
down, down-in-mouth, downbeat, downcast,
glum*, gone to pieces, in a funk, in blue funk, in the dumps, lost momentum,
pessimistic,
sadAntonime: encouraged, heartened,
inspired