Noah Webster's Dictionary (a.) Weak in intellectual power; wanting firmness or constancy; irresolute; vacilating; imbecile. Int. Standard Bible Encyclopedia FEEBLE-MINDED fe'-b'-l-min'-ded (oligopsuchos): Only in 1 Thessalonians 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 Isaiah 35:3; Isaiah 54:6; oligopsuchia occurs in Septuagint twice (Exodus 6:9 Psalm 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.

Multi-Version Concordance Feeble-minded (2 Occurrences) 1 Thessalonians 5:14 Now we exhort you, brethren, warn them that are disorderly, comfort the feeble-minded, support the weak, be patient towards all men. (WBS YLT) Ezekiel 45:20 And this you are to do on the seventh day of the month for everyone who is in error and for the feeble-minded: you are to make the house free from sin. (BBE)