hollowyoudaoicibaDictYouDict[hollow 词源字典]
hollow: [12] Modern English hole comes from an Old English adjective meaning ‘hollow’, and by a coincidental swap hollow originated in an Old English word for ‘hole’ (the two are probably ultimately related). Old English holh meant ‘hollow place’, ‘hole’, or ‘cave’, and presumably came from the same source as produced Old English hol ‘hollow’. In the early Middle English period it began to be used as an adjective, its inflected form holge having become holwe, later holew or hollow.
=> cauliflower[hollow etymology, hollow origin, 英语词源]
hollow (adj.)youdaoicibaDictYouDict
c. 1200, from Old English holh (n.) "hollow place, hole," from Proto-Germanic *hul-, from PIE *kel- (2) "to cover, conceal" (see cell). The figurative sense of "insincere" is attested from 1520s. Related: Hollowly; hollowness. To carry it hollow "take it completely" is first recorded 1660s, of unknown origin or connection.
hollow (v.)youdaoicibaDictYouDict
late 14c., holowen, from hollow (adj.). Related: Hollowed; hollowing.
hollow (n.)youdaoicibaDictYouDict
"lowland, valley, basin," 1550s, probably a modern formation from hollow (adj.). Old English had holh (n.) "cave, den; internal cavity."