Jyutping: en1 pi1 kwan3 naan4 Cantonese Pinyin: en1 pi1 kwan3 naan4 Sinological IPA (key): /ɛːn⁵⁵ pʰiː⁵⁵ kʷʰɐn³³ naːn²¹/ NP困難 (computing theory) NP-hard...
also: Hard, härd, and hård (Received Pronunciation) enPR: häd, IPA(key): /hɑːd/ (General American) enPR: härd, IPA(key): /hɑɹd/ Rhymes: -ɑː(ɹ)d From Middle...