languid
lacking energy; weak
languish
to lose strength; waste away
languor
sluggishness
Note: As you will notice, a lot of L words mean “lazy and lacking energy.”
No doubt learning all this language is giving you so much anguish that you’re
starting to languish.
lassitude
listlessness; a state of exhaustion or weakness
The ship’s crew was in such a state of lassitude that they sailed to the wrong
latitude.
latent
potential but not yet displayed