​​​​​​Lus nug (los ntawm lat. suggestio — suggestion) — ib lo lus sib sau uas hais txog ntau hom kev xav ntawm kev hais lus (hais lus) thiab tsis hais lus rau ib tug neeg txhawm rau tsim ib lub xeev hauv nws (xws li inducement rau qee yam kev ua). Kev tawm tswv yim yog ib qho ntawm cov txheej txheem ntawm kev kho kev puas siab puas ntsws, tshwj xeeb tshaj yog siv los kho cov kev hais lus tsis zoo.
Nyob rau hauv niaj hnub kev puas siab puas ntsws thiab pedagogical sciences, lub sij hawm "suggestive" txhais cov lus qhia ntawm txoj kev kho thiab pedagogical txheej txheem, tsom mus rau tso tawm lub zais cia ntawm lub cev thiab tus cwj pwm los ntawm ntau yam kev tawm tswv yim.