כֵּס (kêçkacenoun|masculineseat)
[Heb] כֵּס, כִּסֵּא ETCBC: כִּסֵּא‎ (subs|seat) OSHL: k.cf.ag TWOT: 1007 GK: H4058
Derivation: apparently a contraction for כִּסֵּא, but probably by erroneous transcription for נֵס
Strong's: {a flag; also a sail; by implication, a flagstaff; generally a signal; figuratively, a token}
KJV: sworn.