Meaning of Whereby
Bangla: যদ্দ্বারা, তদ্দ্বারা, সাহায্যে
Adverb / ক্রিয়া বিশেষণ / क्रिया-विशेषण
by what or by which; under the terms of which.
Obsolete. by what? how?
by or because of which: the means whereby he took his life
(archaic) how? by what means?: whereby does he recognize me?