Usages of معمول
القواعد المعمول بها في هذه الشركة قديمة.al-qawâ'idu al-ma'mûlu bihâ fî hâdhihi ash-sharikati qadîmah
The rules in force at this company are old.
ما زال هذا القانون معمولا به.mâ zâla hâdhâ al-qânûnu ma'mûlan bihi.
This law is still in force.
Elon.io is an online learning platform
We have an entire course teaching Arabic (Modern Standard) grammar and vocabulary.