Answer:
How do you spell hard water with only three letters?
Without coolant, you'll have some trouble with this.
I am partially baked. I am not completely lit. I am a portion of the moon. I am lesser than full wit. I am a divider of the hour. I am not a total lie. I am a sibling through one parent.
It's tough as nails, Or soft as snow. People use it for their rink, Some just put in their drink.
Proof you've done your time in school
I am your mother's brother's only brother in law. Who am I?
Easy
Animal
Difficult
Food
Funny
Kids
Logic
What am I?