'Endeavouring' in the Bible

Meanwhile the High Priests and the entire Sanhedrin were endeavouring to get evidence against Jesus in order to put Him to death, but could find none;

So they arranged a day with him and came to him in considerable numbers at the house of the friends who were entertaining him. And then, with solemn earnestness, he explained to them the subject of the Kingdom of God, endeavouring from morning till evening to convince them about Jesus, both from the Law of Moses and from the Prophets.

Therefore, because we realize how greatly the Lord is to be feared, we are endeavouring to win men over, and God recognizes what our motives are, and I hope that you, in your hearts, recognize them too.

because it was for the sake of Christ's work that he came so near death, hazarding, as he did, his very life in endeavouring to make good any deficiency that there might be in your gifts to me.