All 4 Uses

sloth
in
Utopia, by Thomas More
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He himself ought rather to shake off his sloth, or to lay down his pride, for the contempt or hatred that his people have for him takes its rise from the vices in himself.†
*
for as the hope of gain doth not excite him, so the confidence that he has in other men's industry may make him slothful.†
*
if all those who labour about useless things were set to more profitable employments, and if all they that languish out their lives in sloth and idleness (every one of whom consumes as much as any two of the men that are at work) were forced to labour, you may easily imagine that a small proportion of time would serve for doing all that is either necessary, profitable, or pleasant to mankind, especially while pleasure is kept within its due bounds: this appears very plainly in Utopia;†
But they think it madness for a man to wear out the beauty of his face or the force of his natural strength, to corrupt the sprightliness of his body by sloth and laziness, or to waste it by fasting; that it is madness to weaken the strength of his constitution and reject the other delights of life, unless by renouncing his own satisfaction he can either serve the public or promote the happiness of others, for which he expects a greater recompense from God.†

Definitions:

(1) (sloth as in: mental sloth)
laziness (an unwillingness to work or exert oneself)
(2) (sloth as in: a sloth in the tree)
a type of mammal that seldom moves and is very slow when it does move
(3) (meaning too rare to warrant focus)