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billow (n.)
[billow 词源字典]
1550s, perhaps older in dialectal use, from Old Norse
bylgja
"a wave, a billow," from Proto-Germanic
*bulgjan
(cognates: Middle High German
bulge
"billow, bag"), from PIE
*bhelgh-
"to swell" (see
belly
(n.)).
[billow etymology, billow origin, 英语词源]
billow (v.)
1590s, from
billow
(n.). Related:
Billowed
;
billowing
.