borderlinen.
英 'bɔːdəlaɪn | 美 'bɔrdɚlaɪn
中文n. 边界线，边界；界线\nadj. 边界的；暧昧的
边界线，边界；界线
adj. 边界的；暧昧的
词根词源
borderline (n.)1869, "strip of land along a frontier," from border (n.) + line (n.). As an adjective meaning "verging on" it is attested from 1907, originally in medical jargon.
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