[verb] [I] [past simple] strove or strived, [past participle] striven or strived - to try very hard to do something or make something happen, esp. for a long time or against difficultiesAll of us will continue striving to meet the very highest standards. [+ to infinitive]Mr Roh has kindled expectations that he must now strive to live up to. [+ to infinitive]In her writing she strove for a balance between innovation and familiar prose forms.Many researchers have striven for a greater understanding of the processes which occur inside stars.
STRIVE
Meaning of STRIVE in English
Cambridge English vocab. Кембриджский английский словарь. 2012