Strong’s Hebrew
H5539 — calad
The entry below is Strong’s own definition (1890, public domain), and every verse where the word occurs.
סָלַד
calad — pronounced saw-lad
a primitive root; probably to leap (with joy), i.e. exult:--harden self.
1 occurrence in the KJV.
Job 6:10
Then should I yet have comfort; yea, I would harden myself in sorrow: let him not spare; for I have not concealed the words of the Holy One.