adverb
1.
Synonyms: hard 3, assiduously, dingdong, earnestly, exhaustively, intensively, painstakingly, thoroughly, unremittingly
Related Word: fiercely, furiously, vehemently, viciously, violently
2.
Synonyms: seriously 2, gravely, severely
INTENSELY
Meaning of INTENSELY in English
Merriam Webster. Collegiate thesaurus English vocabulary. Английский энциклопедический словарь тезаурус. 2003