סֶלַע (çelaʻseh'-lahnoun|masculinecrag)
[Heb] סֶלַע ETCBC: סֶלַע‎ (subs|rock) OSHL: o.bq.ab TWOT: 1508a GK: H6152 Greek: κρημνός, πέτρα, στερέωμα
Derivation: from an unused root meaning to be lofty;
Strong's: a craggy rock, literally or figuratively (a fortress)
KJV: (ragged) rock, stone(-ny), strong hold.