| previously | 以前に |
| primarily | 第1に |
| principally | 主に |
| privately | 内密に |
| probably | たぶん |
| profoundly | 深く |
| prominently | 顕著に |
| promptly | 敏速に |
| properly | 適切に |
| proportionally | 比例して |
| proudly | 誇らしげに |
| psychologically | 心理的に |
| publicly | 公に |
| purely | 純粋に |
| quarterly | 四半期の |
| quickly | 速く |
| quietly | 静かに |
| rapidly | 速く |
| rarely | めったに～ない |
| readily | 快く |
| really | 実際は |
| reasonably | 合理的に |
| recently | 最近 |
| regularly | 規則正しく |
| relatively | 相対的に |
| reluctantly | 嫌々ながら |
| remarkably | 著しく |
| repeatedly | 繰り返して |
| reportedly | 伝えられるところによれば |
| respectfully | 丁重に |
| respectively | それぞれ |
| rightly | 正しく |
| roughly | 乱暴に |
| sadly | 悲しんで |
| safely | 安全に |
| scarcely | ほとんど～ない |
| scientifically | 科学的に |
| secondly | 第2に |
| secretly | 秘密に |
| securely | 安全に |
| seemingly | 見たところでは |
| separately | 別々に |
| seriously | まじめに |
| severely | 厳しく |
| sharply | 鋭く |
| shortly | まもなく |
| silently | 静かに |
| similarly | 類似して |
| simply | 簡単に |
| simultaneously | 同時に |
語尾が「-ly」で終わる英単語一覧
