Strong's #3676: kec (pronounced kace)
apparently a contraction for 3678, but probably by erroneous transcription for 5251:--sworn.
Brown-Driver-Briggs Hebrew Lexicon:
ּ
kês
1) seat (of honour), throne, seat, stool
Part of Speech: noun masculine
Relation: apparently a contraction for H3678, but probably by erroneous transcription for H5251
Usage:
This word is used 2 times:
Exodus 17:16: "For he said, Because the LORD hath sworn that the LORD will have war"
Judges 19:16: "out of the field at even, which was also of mount Ephraim; and he"