surreptitious

Impenetrable is a related term of surreptitious.

As adjectives the difference between impenetrable and surreptitious

is that impenetrable is impenetrable while surreptitious is stealth]]y, furtive, [[hidden|well hidden, covert (especially movements).

As adjectives the difference between surreptitious and conspiratorial

is that surreptitious is stealthy, furtive, well hidden, covert (especially movements) while conspiratorial is pertaining to conspiracy or conspirators.

As adjectives the difference between surreptitious and underhand

is that surreptitious is stealthy, furtive, well hidden, covert (especially movements) while underhand is secret; clandestine.

As an adverb underhand is

with an underhand movement.

Surreptitious is a related term of wily.

As adjectives the difference between surreptitious and wily

is that surreptitious is stealth]]y, furtive, [[hidden|well hidden, covert (especially movements) while wily is sly, cunning, full of tricks.

Baffling is a related term of surreptitious.

As adjectives the difference between baffling and surreptitious

is that baffling is puzzling and frustrating while surreptitious is stealth]]y, furtive, [[hidden|well hidden, covert (especially movements).

As a verb baffling

is .

As a noun baffling

is an act of foiling or thwarting.

Cloudy is a related term of surreptitious.

As adjectives the difference between cloudy and surreptitious

is that cloudy is covered with or characterised by clouds; overcast while surreptitious is stealth]]y, furtive, [[hidden|well hidden, covert (especially movements).

Veiled is a related term of surreptitious.

As adjectives the difference between veiled and surreptitious

is that veiled is hidden, such as by a veil while surreptitious is stealth]]y, furtive, [[hidden|well hidden, covert (especially movements).

As a verb veiled

is (veil).

Inexplicable is a related term of surreptitious.

As adjectives the difference between inexplicable and surreptitious

is that inexplicable is impossible to explain; not easily accounted for while surreptitious is stealth]]y, furtive, [[hidden|well hidden, covert (especially movements).

Surreptitious is a related term of shifty.

As adjectives the difference between surreptitious and shifty

is that surreptitious is stealth]]y, furtive, [[hidden|well hidden, covert (especially movements) while shifty is having the appearance of someone dishonest, criminal or unreliable; such as someone with shifty eyes .