# those who were around Jesus

This refers to Jesus' disciples.

# what was happening

This refers to the priests and soldiers coming to arrest Jesus.

# strike with the sword

"fight against them with a sword"

# one of them

"one of the disciples"

# struck the servant of the high priest

"struck the servant of the high priest with a sword"

# That is enough

This expression means, "Do not do any more of that"

# touched his ear

"touched the servant where his ear had been cut off"