いたずらに (translations)→ ill-temperedly needless uselessly
むやみと (translations)→ absurdly indiscriminately
わけのわからない (translations)→ bizarre confused inexplicable maddening mysterious perplexing senseless strange unaccounted unintelligible
一挙に (translations)→ entirely head-on immediately infinitely significantly suddenly
無性に (translations)→ bad blindly excessively excruciating unduly
