Impart

im-part' (metadidomi, "to share"): "They .... imparted (the King James Version "added") nothing to me" (Ga 2:6); that is, did not propose any correction or addition to my teaching. "That I may impart unto you some spiritual gift" (Ro 1:11) expresses the apostle's hope that the Roman believers may increase in faith and love through his teaching and influence.

⇒See the definition of impart in the KJV Dictionary

"To impart unto you .... our own souls" (1Th 2:8) meant to spend their utmost strength and to expose their lives in their service.