to believe; to think; to consider erroneously; to assume (wrongly)[cedict]
他
tāㄊㄚ
he; him[cedict]
走失
zǒu shīㄗㄡˇ ㄕ
lost; missing; to lose (sb in one's charge); to get lost; to wander away; to lose (flavor, freshness, shape, hair, one's good looks etc); to lose meaning (in translation)[cedict]