(algebra) additivity

The arts of magic, spellcraft, witchcraft, wizardry, sorcery. / Spellwork such as magical formulas, incantations, spells, etc.

saturation

be saturated

open a door etc. / open, allow freedom of entry and exit / be open and frank

forecast, predict

a type of incense / a place name / a female given name / a surname

(firefighting, criminology, psychology) pyromaniac

(law, firefighting) arsonist

Short for 東方Project (Tōhō Purojekuto, “Touhou Project, a popular bullet hell video game series”).