What is the meaning of Massy?

Heavy; massive.

Pronunciation spelling of mercy.

Pronunciation spelling of master.

weighty, massy, having great weight.

uncontaminated, unalloyed.

Not hollow; lacking an internal cavity.

tough, firm, sturdy

Unsculpted; not given a shape, primordial.

alternative form of messen (“to hold mass”)

Source: wiktionary.org