G4642–σκληρός–sklēros

Then he who had received the one talent came, and said, Lord, I knew thee that thou art a hard man, reaping where thou hast not sown, and gathering where thou hast not strewed:

σκληρὸς sklēros “hard”

Many therefore of his disciples, when they had heard this, said, This is a hard saying; who can hear it?

σκληρός sklēros “Difficult”

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 goads.

σκληρόν sklēron “hard”

And when we had all fallen to the earth, I heard a voice speaking to me, and saying in the Hebrew language, Saul, Saul, why persecutest thou me? It is hard for thee to kick against the goads.

σκληρόν sklēron “[It is] hard”

Behold also the ships, which though they are so great, and are driven by fierce winds, yet they are turned about with a very small helm, withersoever the governor willeth.

σκληρῶν sklērōn “strong”

To execute judgment upon all, and to convict all that are ungodly among them of all their ungodly deeds which they have impiously committed, and of all their hard speeches which ungodly sinners have spoken against him.

σκληρῶν sklērōn “harsh [things]”