ياومَ يياوم، مُياوَمةً، فهو مُياوِم، والمفعول مُياوَم

استأجره باليوم، أي شغّله يومًا بيوم، ودفع له أجرَه كلّ يوم

🇬🇧 Translation:

Hired him by the day, meaning he employed him day by day and paid his wages every day.