energy:
uselessness,
dispiritedness,
enervation,
lifelessness,
lethargy,
indifference,
idleness,
weakness,
impotence,
indolence,
dullness,
disability,
helplessness,
cowardice,
ineffectiveness,
apathy,
incompetence,
inactivity,
lack,
inefficiency,
powerlessness,
inability,
laziness.
noun:
lifelessness,
apathy,
sleepiness,
weariness,
bashfulness,
dullness,
languor,
modesty,
humility,
vapidity,
torpor,
anemia,
languidness,
tedium,
lethargy,
spiritlessness,
listlessness,
torpidity,
demureness,
limpness,
tediousness,
vapidness,
pallidness,
shyness,
impassivity,
diffidence,
sluggishness.