Peak: (noun) the pointed top of a mountain.
The snow-covered peaks gleamed in the distance.
Peek: (verb) look quickly, typically in a furtive manner
Let’s peek inside and see what’s going on.
Pique: (verb with object) stimulate (interest or curiosity)
The mysterious main character has really piqued my interest.
Origin: Although pique is a term most often used in reference to curiosity or interest, it can also mean to arouse anger or resentment. It originates from the mid-16th century French word piquer meaning to prick or irritate.
Bonus Tip: To remember the definition of peak, imagine the A in the shape of a mountain. To differentiate peek, envision the two e's as glancing eyes.