G4642 — skleros
The entry below is Strong’s own definition (1890, public domain), and every verse where the word occurs.
skleros — pronounced sklay-ros'
from the base of 4628; dry, i.e. hard or tough (figuratively, harsh, severe):--fierce, hard. see GREEK for 4628
6 occurrences in the KJV.
Matthew 25:24
Then he which had received the one talent came and said, Lord, I knew thee that thou art an hard man, reaping where thou hast not sown, and gathering where thou hast not strawed:
John 6:60
Many therefore of his disciples, when they had heard this, said, This is an hard saying; who can hear it?
Acts 9:5
And he said, Who art thou, Lord? And the Lord said, I am Jesus whom thou persecutest: it is hard for thee to kick against the pricks.
Acts 26:14
And when we were all fallen to the earth, I heard a voice speaking unto me, and saying in the Hebrew tongue, Saul, Saul, why persecutest thou me? it is hard for thee to kick against the pricks.
James 3:4
Behold also the ships, which though they be so great, and are driven of fierce winds, yet are they turned about with a very small helm, whithersoever the governor listeth.
Jude 1:15
To execute judgment upon all, and to convince all that are ungodly among them of all their ungodly deeds which they have ungodly committed, and of all their hard speeches which ungodly sinners have spoken against him.