Temperable, meaning capable of being tempered or moderated, has several antonyms that refer to concepts of excess or uncontrollability. Some antonyms for temperable include immoderate, intemperate, intractable, unruly, unmanageable, and uncontrollable. These words suggest a lack of ability to rein in impulses or emotions and a tendency towards excess in behavior or thought. These antonyms can be used to describe people, situations, or things that are difficult to manage or control. Alternatively, related antonyms can include inflexible, stubborn, obstinate, unyielding or rigid, which suggest an inability to compromise or adjust based on circumstances or feedback.