- bumblebee (n.)
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[bumblebee 词源字典] - also bumble-bee, 1520s, replacing Middle English humbul-be (altered by association with Middle English bombeln "to boom, buzz," late 14c.); echoic, from PIE echoic root *kem "to hum."[bumblebee etymology, bumblebee origin, 英语词源]