susceptible Antonyms

unsusceptible as strong as zeus immunogenic unsubduable rubbery burglarproof bulletproof vaccinated unsurmountable unlikely unconquerable sturdy strong stoic safe all-conquering unbeatable unresponsive as strong as the wind as strong as lion as strong as iron as strong as horse as strong as hercules as strong as bulls as strong as an eagle as strong as a bull as sound as a bell bored by immunized immunised unimpressionable unstoppable resistive resistant resisting fibrous dure defensible defendable deadened counteractive challenge certain cautious bodily bloody-minded biological autonomous adamant gristly