/,ʌnə'kaʊntɪd; ,ʌnə`kauntɪd/
adj [pred 作表语] ~ for
(a) not included in an account, a tally, etc 未包括在某数目、帐目等中
*One passenger is still unaccounted for. 仍有一个旅客未在其中.
(b) not explained 未予解释的; 未加说明的
*His disappearance is unaccounted for. 他失踪原因不明.