She wore a mask to protect herself from the dust.

The mass of the object is measured in kilograms.

The massacre of innocent civilians shocked the entire nation.

I booked a massage for tomorrow.

The masseur gave me a relaxing massage.

The dog obeyed its master's commands.

The Mona Lisa is considered a masterpiece of art.

He has achieved mastery in playing the piano.

I'm meeting my mate for lunch.

Mathematical equations can be solved using various methods.