1. guaranteeing
  2. acting as guarantor for
  3. going bond for
  4. taking pains
  5. empty formality
to act as a guarantor for Fiil
to go bond for Fiil
to guarantee Fiil

Türkçe Sözlük (Kubbealti Lugati)

  1. Güçlüğe, zahmetli ... işe katlanma