かねない

かねない is used to warn that something undesirable or risky could happen. It expresses a strong possibility, often with a sense of caution or concern. It can follow the stem form of verbs (especially动作 verbs), including the masu-stem, and is used in formal or careful speech. It does not imply certainty; rather, it indicates that the outcome is plausible but undesirable. Note that the common, natural construction is to attach かねない to the verb stem (e.g., 話す -> 話しかねない; する -> しかねない). It is less common with true adjectives or nouns, but can appear with 〜かねない after noun phrases in some contexts to signal potential risk.