pen2 past tense and past participle penned, present participle penning [transitive]
to write something such as a letter, a book etc, especially using a pen:
a song penned by George Clinton
pen somebody/something ↔ up/inphrasal verb
to shut an animal in a small enclosed area
to be restricted or forced to remain in a small place:
Norma felt restless and penned in.