adverbdobhriathar1to a dangerous degreeshe was perilously illbhí sí an-tinn ar fadthe bridge is perilously narrowtá an droichead an-chúng go deo2in a dangerous mannergo contúirteachcmugo dainséarachcmuthe car was swerving perilously from side to sidebhí an carr ag imeacht ó thaobh go taobh go contúirteachthey hung perilously on to powerar éigean Dé a d'fhan siad i gcumhacht