'Burdensome' in the Bible

I alone am not able to carry all this people, because it is too burdensome for me.

But the king said to Absalom, “No, my son, we should not all go, for we will be burdensome to you.” Although he urged him, he would not go, but blessed him.

Bel has bowed down, Nebo stoops over;Their images are consigned to the beasts and the cattle.The things that you carry are burdensome,A load for the weary beast.

For this is the love of God, that we keep His commandments; and His commandments are not burdensome.