Is it ensure, insure, or assure?
late 14c., from Latin ligamentum "band, tie, ligature," from ligare "to bind, tie," from PIE *leig- "to bind" (cf. Albanian lith "I bind," Middle Low German lik "band," Middle High German geleich "joint, limb"). Related: Ligamental; ligamentary.
ligament lig·a·ment (lĭg'ə-mənt)
A band or sheet of tough fibrous tissue connecting two or more bones, cartilages, or other structures, or serving as support for fasciae or muscles.
A fold of peritoneum supporting any of the abdominal viscera.
The cordlike remains of a fetal vessel or other structure that has lost its original lumen.