adv. very, extremely, exceedingly, thoroughly, decidedly, unbelievably, incredibly, monumentally, outrageously, awfully, fabulously, Colloq frightfully They were terribly apologetic about being late I missed him terribly when he left.
TERRIBLY
Meaning of TERRIBLY in English
Oxford thesaurus English vocab. Английский словарь Оксфорд тезаурус. 2012