• v. 露齿而笑，咧着嘴笑
• n. 露齿笑
• n. (Grin)人名；(法)格兰；(俄、罗、英)格林

来自PIE*ghrei, 开口，可能来自拟声词，模仿笑的声音。比较grim.

grin

grin: [OE] Modern English grin and groan are scarcely semantic neighbours, but a possible common ancestor may provide the link: prehistoric Indo-European *ghrei-, which seems to have meant something like ‘be open’. It has been suggested as the source of a range of verbs which started off denoting simply ‘open the mouth’, but have since differentiated along the lines ‘make noise’ and ‘grimace’. Grin has taken the latter course, but close relatives, such as Old High German grennan ‘mutter’ and Old Norse grenja ‘howl’, show that the parting of the semantic ways was not so distant in time.

Old English grennian actually meant ‘draw back the lips and bare the teeth in pain or anger’. Traces of this survive in such distinctly unfunny expressions as ‘grinning skull’, but the modern sense ‘draw back the lips in amusement’ did not begin to emerge until the 15th century. Groan [OE], on the other hand, is firmly in the ‘make noise’ camp.
=> groan

grin (n.)

1630s, from grin (v.).

grin (v.)

Old English grennian "show the teeth" (in pain or anger), common Germanic (cognates: Old Norse grenja "to howl," grina "to grin;" Dutch grienen "to whine;" German greinen "to cry"), from PIE root *ghrei- "be open." Sense of "bare the teeth in a broad smile" is late 15c., perhaps via the notion of "forced or unnatural smile." Related: Grinned; grinning.

1. All at once, Mick's serious expression softened into a grin.

米克严肃的表情一下子变成了笑脸。

来自柯林斯例句

2. He had a grin on his face like a Cheshire Cat.

他咧着嘴笑呵呵的。

来自柯林斯例句

3. Bobby looked at her with a sheepish grin.

博比望着她腼腆地咧嘴一笑。

来自柯林斯例句

4. His face broke into a wide grin.

他脸上绽放出灿烂的笑容。

来自柯林斯例句

5. He always had this inane grin.

他总是这样傻傻地咧嘴笑。

来自柯林斯例句