hypo-
IPA: PHONETIC RESPELLING:
作为构词元素意为“在。。。之下的；比。。少”（在化学中意为一个更低的化合价），来自希腊语的hypo（词性为介词和副词）“在…之下；up from under; toward and under (即 into)”，起源自PIE词根*upo“在…之下”
word-forming element meaning "under, beneath; less, less than" (in chemistry, indicating a lesser oxidation), from Greek hypo (prep. and adverb) "under, beneath; up from under; toward and under (i.e. into)," from PIE root *upo "under."