'Hard' in the Bible

Thou hast shewed thy people hard things: thou hast made us to drink the wine of astonishment.

My soul followeth hard after thee: thy right hand upholdeth me.

Thy wrath lieth hard upon me, and thou hast afflicted me with all thy waves. Selah.

How long shall they utter and speak hard things? and all the workers of iniquity boast themselves?