'Heavy' in the Bible

but whoever causes one of these little ones who believe in Me to stumble, it would be better for him to have a heavy millstone hung around his neck, and to be drowned in the depth of the sea.

They tie up heavy burdens and lay them on men’s shoulders, but they themselves are unwilling to move them with so much as a finger.

Again He came and found them sleeping, for their eyes were heavy.

“Whoever causes one of these little ones who believe to stumble, it would be better for him if, with a heavy millstone hung around his neck, he had been cast into the sea.

And again He came and found them sleeping, for their eyes were very heavy; and they did not know what to answer Him.