事前に必要[jizennihitsuyou] prerequisite
生者必滅[shoujahitsumetsu] All living things must die
絶対必要[zettaihitsuyou] absolutely necessary
必ず[kanarazu] always
必ずしも[kanarazushimo] (not) always

必ずや[kanarazuya] certainly
必携[hikkei] handbook
必見[hikken] worth seeing
必殺[hissatsu] certain kill
必死に[hisshini] frantically

愛読[aidoku] reading with pleasure
愛読者[aidokusha] subscriber
愛読書[aidokusho] favourite book
暗号解読[angoukaidoku] cryptanalysis
一読[ichidoku] perusal

閲読[etsudoku] reading
音読[ondoku] reading aloud
音読み[onyomi] on (Chinese) reading of kanji
下読[shitayomi] preparatory reading
可読[kadoku] readable