Spelled esally tehwiill (long ii) in the dictionary, but here Couro clearly pronounces it with a short i. However, it is possible that esally tehwiill is also a valid pronunciation.
Literally "fits the hand"; refers to basically any band-shaped thing worn on the hand or finger.
Esally: arm/hand
tehwill: from verb tuuhwill (tetehwiill), "fits, buttons, traps, jails, attaches, connects"
Esally tuuhwill (with the verb fully pronounced) can also mean "handcuffs somebody" (literally, he cuffs her hands)