furtivamente

Etymology
From.

Adverb

 * 1) furtively
 * 2) on the sly

Etymology
From.

Adverb

 * 1) stealthily in a stealthy manner

Etymology
From.

Adverb

 * 1) furtively, stealthily
 * 2) clandestinely
 * 1) clandestinely