Difficult or impossible to comprehend, fathom, or interpret.

One who or that which is inscrutable; a person, etc. that cannot be comprehended.

(idiomatic) A joke that is understood or meant to be understood only by certain people who are aware of the details.

Not genuinely meaning what has been expressed; not sincere; artificial.

(insurance) A legal document outlining a particular insurance cover for an insured entity for a given risk. / Something that protects or safeguards.

To sow (to disperse or plant seeds). / To fill with one's semen. / (by extension) To impregnate (to cause to become pregnant).

Any insurance against a potential loss due to the insured's liability for injury or damage to others.

A patch or other object that indicates a person's official or military rank, or membership in a group or organization.

plural of insignium / plural of insigne

A person who has special knowledge about the inner workings of a group, organization, or institution. / A person who is within an enclosed space.