一個[ikko] piece
各個[kakko] every one
個室[koshitsu] private room
個条[kajou] article
個人[kojin] individual

個人タクシー[kojintakushii] privately owned taxi
個人教授[kojinkyouju] private instruction
個人経営[kojinkeiei] private management
個人個人[kojinkojin] individual

安全[anzen] safety
安全域[anzeniki] safety margin
安全運転[anzenunten] safe driving
安全器[anzenki] safety device
安全期[anzenki] safe period

安全教育[anzenkyouiku] safety education
安全性[anzensei] safety
安全対策[anzentaisaku] safety measure
安全第一[anzendaiichi] safety first
安全地帯[anzenchitai] safety zone