כֵּף (kêphkafenoun|masculinerock)
[Heb] כֵּף ETCBC: כֵּף‎ (subs|rock) OSHL: k.cn.ae TWOT: 1017 GK: H4091 Greek: πέτρα, Κηφᾶς
Derivation: from כָּפַף;
Strong's: a hollow rock
KJV: rock.