subtle

As adjectives the difference between clever and subtle

is that clever is nimble with hands or body; skillful; adept while subtle is hard to grasp; not obvious or easily understood; barely noticeable.

As adjectives the difference between subtle and sober

is that subtle is hard to grasp; not obvious or easily understood; barely noticeable while sober is not drunk; not intoxicated.

As a verb sober is

(often with up) To make or become sober.

Skilful is a related term of subtle.

As adjectives the difference between skilful and subtle

is that skilful is possessing skill, skilled while subtle is hard to grasp; not obvious or easily understood; barely noticeable.

As a noun scuttle

is a container like an open bucket (usually to hold and carry coal) or scuttle can be a small hatch or opening in a boat also, small opening in a boat or ship for draining water from open deck or scuttle can be a quick pace; a short run.

As a verb scuttle

is (nautical) to cut a hole or holes through the bottom, deck, or sides of (as of a ship), for any purpose or scuttle can be to move hastily, to scurry.

As an adjective subtle is

hard to grasp; not obvious or easily understood; barely noticeable.

Subtle is a related term of circumspect.

As adjectives the difference between subtle and circumspect

is that subtle is hard to grasp; not obvious or easily understood; barely noticeable while circumspect is carefully aware of all circumstances; considerate of all that is pertinent.

Subtle is a related term of cagey.

As adjectives the difference between subtle and cagey

is that subtle is hard to grasp; not obvious or easily understood; barely noticeable while cagey is wary, careful, shrewd.

Subtle is a related term of wary.

As adjectives the difference between subtle and wary

is that subtle is hard to grasp; not obvious or easily understood; barely noticeable while wary is cautious of danger; carefully watching and guarding against deception, artifices, and dangers; timorously or suspiciously prudent; circumspect; scrupulous; careful.

Imaginary is a related term of subtle.

As adjectives the difference between imaginary and subtle

is that imaginary is existing only in the imagination while subtle is hard to grasp; not obvious or easily understood; barely noticeable.

As a noun imaginary

is imagination; fancy.

As adjectives the difference between indefinite and subtle

is that indefinite is without limit; forever, or until further notice; not definite while subtle is hard to grasp; not obvious or easily understood; barely noticeable.

As adjectives the difference between subtle and astute

is that subtle is hard to grasp; not obvious or easily understood; barely noticeable while astute is quickly and critically discerning.