奇怪しい[okashii] funny
怪しからん[keshikaran] outrageous
怪しげ[ayashige] questionable
怪しむ[ayashimu] to suspect
怪異[kaii] strangeness

怪我[kega] injury (to animate object)
怪我人[keganin] wounded or injured person
怪奇[kaiki] bizarre
怪傑[kaiketsu] man of extraordinary talent
怪死[kaishi] mysterious death

火燵掛布[kotatsugake] cover for kotatsu
火燵布団[kotatsubuton] cover for kotatsu
引火[inka] catching fire
引火温度[inkaondo] flash temperature
引火点[inkaten] flash point

曳火弾[eikadan] tracer bullet
煙火[enka] smoke and fumes (e.g. from cooking)
遠火[toobi] distant fire
下火[shitabi] burning low
下火になる[shitabininaru] to be under control