synallagmaticadj.
sɪ,næləɡ'mætɪk
中文adj. 对双方具有约束力的；双务的
词根词源
synallagmatic (adj.)"expressing reciprocal obligations," from Greek synallagmatikos, from synallagma "a covenant, contract," from syn- "together with" (see syn-) + allagma "thing taken in exchange," from stem of allassein "to exchange, barter," from allos "another" (see alias (adv.)).
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