怠る【おこたる】
to neglect, to be negligent in, to be neglectful of, to fail to do, to leave undone, to avoid (doing), to shirk, to be unmindful of, to improve (of an illness), to get better
怠惰【たいだ】
lazy, idle, indolent, slothful
怠け者【なまけもの】
lazy person, lazy fellow, slothful person
倦怠【けんたい】
weariness, fatigue, languor, boredom, tedium, ennui
怠慢【たいまん】
negligence, neglect, carelessness, procrastination
怠り【おこたり】
negligence, carelessness