mersi

Mersi is a colloquial expression meaning "thank you" used in several languages, most notably Romanian and Persian. The form is a loanword derived from the French merci and has been adopted into everyday speech through contact with French language and global media.

In Romanian, mersi is common in informal speech and writing, functioning as a casual equivalent of mulțumesc. It appears in conversation, social media, and everyday communication among friends and colleagues, while more formal contexts typically use mulțumesc or vă mulțumesc. An example is a casual sentence such as "Mersi pentru ajutor." The word is widely understood but regarded as informal.

In Persian (Farsi), the transliteration mersi is written in Persian script as مرسی and is widely used in casual conversation. More formal alternatives exist, such as mamnoon (thank you) or moteshakeram (I am grateful). The Persian usage of mersi reflects ongoing influence from French and other Western languages in colloquial speech. Example: "مرسی از کمک شما" (mersi az komak-e shomâ, thank you for your help).

Beyond Romanian and Persian, mersi may appear in multilingual contexts or studies of loanwords as an example of how French loanwords are adapted into other languages. It is typically not used in formal writing or official contexts in Romanian and Persian, where native equivalents are preferred.