אֱסָר (ʼĕçâres-sawr'noun|masculinebond)
[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.