Brain Teaser Of The Day: 7 Letters

1-2-3-4-5-6-7

Letters 1-2-6-3-5-4-7 mean the thickness of something.
Letters 7-2-4-5 mean a legendary large, hairy creature that is said to inhabit the Himalayas.
Letters 7-2-3 mean something that is said to show approval, which you wouldn’t be saying if you were trying to 1-2-6-7 something.
Letters 4-5-2-1 mean that everything is equal.

The whole word means a predetermined course of events.