NSW Selective & Scholarship
Unassailable
adjective/un-uh-SAY-luh-buhl/
So strong that it cannot be attacked, defeated or proven wrong.
In contextHer argument was unassailable because every fact checked out perfectly.
Remember it
To 'assail' is to attack; 'un-' plus '-able' means it cannot be attacked.
Use it well
Use for leads, positions or arguments that are impossible to challenge.