What it means
اصولاً (osulan) is a formal adverb meaning “basically,” “in principle,” or “as a rule.” It comes from Arabic, built on the root اصول (usul), the plural of اصل (asl, meaning root or principle). Speakers use it to state a general truth or ideal standard before acknowledging that exceptions exist. A close synonym is اساساً (asasan), which is slightly more emphatic on foundational logic. In everyday speech اصولاً can also carry a mild tone of gentle reproach, as in “the proper way to do this is…”
How to use it
- اصولاً این کار درست نیست. (Osulan in kâr dorost nist.) “Basically, this is not the right thing to do.”
- اصولاً باید قبل از ورود اجازه بگیری. (Osulan bâyad qabl az vorud ejâze begiri.) “In principle, you should ask permission before entering.”
- اصولاً من با این طرح مخالفم. (Osulan man bâ in tarh mokhâlfam.) “As a rule, I am against this plan.”
- اصولاً قانون این را ممنوع کرده. (Osulan qânun in râ mamnu karde.) “In principle, the law has prohibited this.”
Cultural note
اصولاً is a fixture of formal writing, journalism, and educated speech in Iran. You will hear it in news analysis, legal commentary, and academic discussion. In spoken Persian it sometimes softens a criticism: instead of saying someone is wrong outright, a speaker might begin with اصولاً to frame a correction as a matter of principle rather than a personal attack. The word reflects the deep influence of Arabic scholarly vocabulary on formal Persian discourse.