run-in
n.
"quarrel, confrontation," 1905, from verbal phrase, from run, v. + in, adv.. From 1857 as "an act of running in."
| 词汇 | run-in | 
| 词根词缀 | Online Etymology Dictionary run-in n. "quarrel, confrontation," 1905, from verbal phrase, from run, v. + in, adv.. From 1857 as "an act of running in." | 
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