without any mistakes or errors

impeccable
seeming believable or reasonable enough to be considered true

plausible
easily and quickly burned

inflammable
deserving disapproval and condemnation due to being extremely wicked or evil

méprisable, ignoble
(of a subject of discussion) unclear or uncertain, therefore can be further discussed or disagreed with

discutable, contestable
easy to approach, and pleasant to talk to

affable
able to exist together without conflict or problems

compatible
having enough reason to take someone to court over a legal matter

recevable, passible de poursuite
causing fear due to greatness or being impressive

redoutable
liable to attack or harm, especially in a strategic or defensive sense

vulnérable
responsible for an act that is morally or legally wrong

coupable
carried out through physical force against someone's wishes or intentions

de force, par la force
(of people or animals) easily controlled or influenced by external factors or authority

maniable
