Strong's #3799: opsis (pronounced op'-sis)
 from 3700; properly, sight (the act), i.e. (by implication) the visage, an external show:--appearance, countenance, face.
Thayer's Greek Lexicon:
 ̓́ 
 
  opsis 
 
 1) seeing, sight
 2) face, countenance
 3) the outward appearance, look
 
  Part of Speech: noun feminine
Relation: from G3700
 
Usage:
This word is used 3 times:
John 7:24: "Judge not according  to the appearance, but judge righteous judgment."
John 11:44: "with graveclothes: and his  face was bound about with a napkin. Jesus saith"
Revelation 1:16: "sword and his  countenance was as the sun shineth"