Feeble-minded

fe'-b'-l-min'-ded (oligopsuchos): Only in 1Th 5:14 the King James Version, in the sense of "fainthearted," as in the Revised Version (British and American). In Septuagint it is used as the equivalent of koshel, the tottering or feeble-kneed in Isa 35:3; 54:6; oligopsuchia occurs in Septuagint twice (Ex 6:9; Ps 54:7), for "anguish of spirit" and "trouble." The term refers to weakness of will and vacillation of purpose rather than to idiocy or morbid imbecility.