)1 adverb with your head firsti ndiaidh do chinn c m ui mullach do chinnthey dived headfirst into the waterthum siad isteach san uisce i ndiaidh a gcinnshe fell headfirstthit sí i mullach a cinnhe was thrown headfirst into the bushescaitheadh i ndiaidh a chinn sna sceacha é2 adverb without enough preparationgan smaoineamh c m udon't jump headfirst into the exercisená tosaigh ar an gceacht gan smaoineamh