stealthy

a disposition to be sly and stealthy and to do things surreptitiously

the act of prowling (walking about in a stealthy manner) v

n the act of prowling (walking about in a stealthy manner) v move about in or as if in a predatory manner v loiter about, with no apparent aim

in a stealthy manner

The state, quality, or character of being stealthy; stealth.