死背

死背	sǐ bèi	to learn by rote
死	sǐ	to die / impassable / uncrossable / inflexible / rigid / extremely / damned
背	bēi	variant of 背
背	bēi	to be burdened / to carry on the back or shoulder
背	bèi	the back of a body or object / to turn one's back / to hide something from / to learn by heart / to recite from memory / (slang) unlucky / hard of hearing