奈培

neper (unit of ratio, Np)

used in expressions that convey frustration and futility, such as 無奈|无奈[wu2 nai4] and 莫可奈何|莫可奈何[mo4 ke3 nai4 he2] (literary) / used for its phonetic value in writing foreign words

to bank up with earth / to cultivate (lit. or fig.) / to train (people)