'Hard' in the Bible

And Simon answered [and] said, "Master, [although we] worked hard through the whole night, we caught nothing. But at your word I will let down the nets."

And Jesus said, "Who [is] the one who touched me?" And [when they] all denied [it], Peter said, "Master, the crowds are pressing you hard and crowding [you]!"

So he said, "Woe to you also, legal experts, because you load people [with] burdens hard to bear, and [you] yourselves do not touch the burdens with one of your fingers!

For days will come upon you and your enemies will put up an embankment against you, and will surround you and press you hard from all directions.