acedia

n. indifference, apathy, lack of interest (in religion, life, etc.)

In the Christian moral tradition, sloth (Latin: acedia, accidia, pigritia) is one of the seven capital sins, often called the seven deadly sins; these sins are called the capital sins because they lead easily to other sins. Sloth is defined as spiritual and/or actual apathy or laziness, putting off what God asks you to do, or not doing it or anything at all. Acedia is a Latin word, from Greek akedia, literally meaning "absence of caring".
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Noun
1. apathy and inactivity in the practice of virtue (personified as one of the deadly sins)
(synonym) sloth, laziness
(hypernym) mortal sin, deadly sin

n. acidity, sourness; unpleasantness; heartburn, burning sensation in the stomach or chest area caused by indigestion; plaice, any of various edible flatfishes

adj. slackness, languidness, apathy

v. submit; accede to, agree to