√df2 'heed'
[perfect: dadre ]aorist: [1.] adfTAs etc. -- [3.] adIdarat -- [4.] dfDvam [future: darizyate dartA ]verbal: dfta E.+ -d/ftya B.+ secondary: passive: driy/ate etc. B.+ driy/ati etc. E.+ -- intensive: dardf- dedrIya- -- desiderative: didariza- -- causative: dAraya- derivatives: -dara -darin C. -daraRa S.+ -daraRIya C. -dartavya C. -dAra V.B.S. -duri RV. -dftya B. Only with prefix A, and with passive present-system, suggesting a specialization from √1df.