inexplicable

Emphasizes the total lack of explanation.

Used when a new piece of information makes sense of something that was previously unexplainable.

Similar to 'completely', often used in British English.

A strong emphasis on the complete lack of explanation, often used informally.

Suggests that something seems inexplicable based on current information.

Indicates that something appears inexplicable on the surface.

Used to state that something is unexplainable.

Used to suggest that something appears to be unexplainable.

Used to emphasize that something continues to be unexplainable.

Used to express one's personal opinion that something is unexplainable.