一次記憶[ichijikioku] first memory
憶説[okusetsu] hypothesis
憶念[okunen] something one always remembers
憶病[okubyou] cowardice
仮想記憶[kasoukioku] virtual memory

憶える[oboeru] to memorize
記憶[kioku] memory
記憶装置[kiokusouchi] storage (device)
記憶媒体[kiokubaitai] storage medium
記憶法[kiokuhou] mnemonic

雅懐[gakai] aesthetic sentiment
懐かしい[natsukashii] dear
懐かしむ[natsukashimu] to yearn for (someone, something)
懐く[natsuku] to become emotionally attached
懐ける[natsukeru] to win over

懐疑[kaigi] doubt
懐旧[kaikyuu] recalling the old days
懐古[kaiko] recalling the old days
懐柔[kaijuu] winning over