You searched for: “impugnable
impugnable (adjective), more impugnable, most impugnable
Suitable to being discredited, questioned , or open to verbal arguments: The man's motives for taking his wife's car without asking her or giving any reasons for his action was impugnable, also because he didn't even bring it back at all!
This entry is located in the following units: -able (page 18) pugn-, pug-, pugil- (page 1)