Words about words

You peek when you quickly look at something from a hiding place, where you think no-one will see you. The cat in the picture is peeking out from behind a cupboard.

You peer at something when you look at it for a long time in a searching kind of way.

The plural of person is people.

Something is permanent if it will last forever, or for a very, very long time. The hand prints made in the concrete in the picture will be there permanently.
The opposite of permanent is temporary.

Piled is the past tense of pile.

Something is pinned if it is held in place by something, usually by a pin. You can pin something down without pins, for example "her hands were pinned to her sides".

You play when you do something just for the fun of it. The child in the picture is playing.

Playful means full of fun and not too serious. You may see a playful dog, child, or cat chasing a toy.

The word can also describe words or jokes that are light and friendly.

Ploughed is the past tense of plough.

You pluck something by pulling it off at the growing point. People commonly pluck out hairs from their eyebrows, pluck fruit from a tree or vine, or most commonly pluck the feathers from a bird like a chicken to prepare it for cooking. The chicken in the picture has been plucked everywhere except its wings.
Plucking can also describe a short, sharp way of playing an instrument like a guitar, or even be used as another word for courage, as in "he has a lot of pluck".