1. (adv.) By which; -- used relatively.
2. (adv.) By what; how; -- used interrogatively.
Thesaurus Entries
by, by dint of, by use of, by virtue of, by way of, helped by, hereby, herewith, in virtue of, on, per, thanks to, thereby, therewith, through, upon, via, whereby, wherewith, wherewithal, with
