[in sing.][treated as pl.]one's family and relations 亲戚,亲属 ■[mass noun]relationship by blood 血亲、血缘(关系) ties of kindred. 血亲关系。
adjective
[attrib.]similar in kind; related 类似的,相关的 books on kindred subjects. 相关科目的书籍。
语源
Middle English: from kin + -red (from Old English rǣden 'condition'), with insertion of -d- in the modern spelling through phonetic development (as in thunder)