arsis
/ˈɑːsɪs/noun
(pl. arses /-siːz/)
- Prosody a stressed syllable or part of a metrical foot in Greek or Latin verse【诗韵】（希腊或拉丁诗歌中的）重读音节; 韵脚。常与THESIS （义项3）相对。
词源
late Middle English: via late Latin from Greek， literally 'lifting'， from airein 'raise'.