SIDLE
It is called erosion.
when proteins help molecules move across the membrane, it it called Facilitated Diffusion
The region of an atom in which the electrons move is called the electron shell, or electron cloud.
euglena
There's a thing called muscles.
lure
The senator glanced furtively toward his aide as he answered the questions. Furtively means do something with stealth. Synonyms for furtively we would be; secretly, hidden, surreptitiously, slyly, stealthily, underhandedly.
A Palindrome to look furtively is "sneak a peek."
The intelligence officer crept furtively around the building collating information as he went.
The word furtively is an adverb. You can easily spot adverbs as most of them end in -ly.
The word "furtively" is an adverb. It describes how an action is done, in a secretive or sneaky manner.
spied?
He furtively tip-toed past his parents' room, making sure that he wouldn't wake them up as he snuck out of the house.
lure
quietly, sneakily, furtively, secretly, covertly, surreptitiously ..
furtively, inconspicuously, nervously, quietly
It can be, meaning a quick glance. But it is also a verb meaning to peep or glance furtively.