堂弟媳

wife of younger male cousin via male line

(main) hall / large room for a specific purpose / CL:間|间[jian1] / relationship between cousins etc on the paternal side of a family / of the same clan / classifier for classes, lectures etc / classifier for sets of furniture

younger male patrilineal cousin

younger brother / junior male / I (modest word in letter)

variant of 悌[ti4]

younger brother's wife / sister-in-law

daughter-in-law