What is the meaning of Preen?

A forked tool used by clothiers for dressing cloth.

A pin.

A bodkin; brooch.

To pin; fasten.

To groom; to trim or dress the feathers with the beak.

To spend time making oneself attractive and admiring one's appearance, e.g. in front of a mirror.

To show off, posture, or smarm.

To flatter.

To comb; to make orderly.

To trim up, as trees.

To improve the appearance of; groom; prettify.

metal pin

pine needle

to pin (fasten with a pin)

to dress oneself up

inflection of prear:

1. third-person plural present subjunctive
2. third-person plural imperative

third-person plural present subjunctive

third-person plural imperative

Source: wiktionary.org