Laziness is an unwillingness to make any effort. Sheer laziness, blame his laziness, intellectual laziness.
It is a moral judgement rather than a description, and what looks like laziness is often exhaustion, depression or a task nobody explained. Intellectual laziness is the sharper use and means accepting the first answer that came to hand.
1nounlazinessAn unwillingness to make any effort.
“His teacher blamed his poor marks on laziness, since he never did his homework.”
laziness is a failing.
Proto-Indo-European
*las- — weak
Proto-Germanic
*lasiwaz
Old Saxon
lask
Middle Low German
lasich — slack, feeble, lazy
English
lazy
English, today
laziness
Built from
From lazy + -ness. lazy Attested since 1540, origin uncertain. Probably from Low German - and Middle Low German lasich (“slack, feeble, lazy”), from las, from Old Saxon lask, from Proto-Germanic lasiwaz, laskaz (“feeble, weak”), from Proto-Indo-European las- (“weak”). Akin to Dutch leuzig (“lazy”), German lässig (“casual, nonchalant, laid-back, easy-going”), Old Norse lasinn (“limpy, tired, weak”), Old English lesu, lysu (“false, evil, base”). More at lush. An alternative etymology traces lazy to Early Modern English laysy, a derivative of lay (plural lays + -y) in the same way that tipsy is derived from tip. See lay.
Etymology from Wiktionary, CC BY-SA