ـیدن

Persian

Etymology

Inherited from Middle Persian [script needed] (-ytn' /⁠-īdan⁠/), -𐫏𐫅𐫗 (-ydn /⁠-īdan⁠/, infinitive-forming suffix), reanalysis of the full grade of certain verbal roots + Old Persian [Term?] (/⁠tanaiy⁠/, infinitive suffix), wherein the ending of the ablauted root was reanalyzed as part of the suffix.

Pronunciation

(Classical Persian) IPA^(key): [‿iː.ˈðan]

(Dari, formal) IPA^(key): [‿iː.d̪ǽn]
- (Kabuli) IPA^(key): [‿iː.d̪ǽn]
- (Hazaragi) IPA^(key): [‿i.d̪ǽn]

(Iran, formal) IPA^(key): [‿iː.d̪ǽn]

(Tajik, formal) IPA^(key): [‿i.d̪ǽn]

Readings
Classical reading^?	‿īḏan
Dari reading^?	‿īdan
Iranian reading^?	‿idan
Tajik reading^?	‿idan

Suffix

ـیدن • (-idan)

Forms regular verbal infinitives:
1. Derives regular infinitives from the present stem of verbs with irregular infinitives.
  ‎ (xâb, present stem of (xoftan, “to sleep”)) + ‎ (-idan) → ‎ (xâbidan, “to sleep”)
  
  ‎ (ruy, present stem of (rostan, “to grow”)) + ‎ (-idan) → ‎ (ruyidan, “to grow”)
2. (if newly formed, then slang, neologism) Derives regular verbal infinitives from nouns.
  ‎ (raqs, “dance”) + ‎ (-idan) → ‎ (raqsidan, “to dance”)
  
  ‎ (nâm, “name”) + ‎ (-idan) → ‎ (nâmidan, “to name”)
  
  ‎ (fekr, “thought”) + ‎ (-idan) → ‎ (fekridan, “(neologism) to think”)
  
  ‎ (tâyp, “typing (on a keyboard)”) + ‎ (-idan) → ‎ (tâypidan, “(neologism) to type”)

Usage notes

It is not acceptable to form new verbs from nouns using this suffix in standard or formal language. Words like (fekridan) as opposed to normal (fekr kardan) tend to be teenage slang.