を装った

pretended to be

→ を
phrase Rare #31,720
pretended to be Used to say that someone pretended to have a certain attitude, condition, or identity. It is the past form of 装う, often translated as “feigned” or “disguised.”
JA: 彼は何も知らないふりを装った。
EN: He pretended not to know anything.

失踪を装った

Pretended to have disappeared

— 嵐の中で (2018)

痛みがあるのにも関わらず、彼は平静を装った

Despite the pain, he pretended to remain calm.

彼女は無邪気を装った

She pretended to be innocent.

彼は無知を装ったが、そのことが私をさらに怒らせた

He pretended not to know, which only made me even angrier.

トム平静を装った

Tom pretended to be calm.