אֱסָר‎ (ʼĕçâr|es-sawr'|noun|masculine|bond)
[Heb] אֱסָר‎, אִסָּר‎ ETCBC: אִסָּר‎ (subs|obligation) OSHL: a.ew.af TWOT: 141d GK: H674
Derivation: or אִסָּר‎; from אָסַר‎;
Strong's: an obligation or vow (of abstinence)
KJV: binding, bond.