Smiling when you are happy is this type of activity.

He tried to ______ his boat in the water but it wouldn't sink.

The colonist were _________ to the rule of the British.

Which word is the name of a water vessel that spends most of its time deep beneath the surface of the sea?

She tried to _______her excitement so she wouldn't give the surprise away.

The potato farmer decided to try a new ___________ system.

The school nurse could not remove the splinter since it was ___________.

The sergeant told his ___________ what they needed to do on the military mission.

What is a train underground called?

The prefix sub- means _____