exignesco
ex-ignesco, ĕre,
- v. inch. n., to become ignited, turn to fire: mundus tum exignescere, tum exaquescere videtur, Censor. de Die Nat. 18.
ex-īgnēsco, ere, feurig werden, Censorin. 18. § 11.
exignēscō, ĕre, intr., sʼembraser : Censor. 18, 11.