偷偷 (tōu tōu): Stealthily (Adverb) — Meaning & Stroke Order

Despite the ban, they still secretly hew this protected woodland.

He was not concentrating on the report at all; instead, he was secretly playing on his phone.

During the lengthy academic conference, he couldn't help but secretly take a nap.

I saw my neighbor secretly dump old furniture on the street corner, which is really a headache.