strive
For the verb: "to strive"
| Simple Past: | strove |
| Past Participle: | striven |
Concise Oxford English Dictionary © 2008 Oxford University Press:
strive/strʌɪv/
▶verb (past strove or strived; past part. striven or strived) make great efforts.
■ (strive against) fight vigorously against.
– derivatives
striver noun.
striver noun.
– origin ME: shortening of OFr. estriver; rel. to estrif ‘strife’.
'strive' also found in these Oxford entries:

