He caught a fish using a harpoon.

Mercury is the god of commerce, travel, thieves, and merchants in Roman mythology, equivalent to Hermes in Greek mythology.

This thermometer uses mercury.

Psyche is a goddess in Greek mythology.

He was stalking her.

She was scared of the stalker.

His talk was like a tautology, repeating the same thing over and over again.

The beaver is gnawing on a tree by the river.

Beavers are good at gnawing wood.

We were able to significantly improve efficiency by automating this process.