stupid /ˈstuː.pɪd/ /ˈstjuːpɪd/
foolish /ˈfuː.lɪʃ/ /ˈfuːlɪʃ/
idiotic /ˌɪdiˈɑtɪk/ /ˌɪdɪˈɒtɪk/
silly /ˈsɪl.i/ /ˈsɪli/
foolishly /ˈfuː.lɪʃ.li/ /ˈfuːlɪʃli/
idiotically /ˌɪdɪˈɑːɾɪkli/ /ˌɪdɪˈɒtɪkli/