By
Definition of by:
part of speech: preposition
At the side of: near to: through, denoting the agent, cause, means, etc.
part of speech: adverb
Near; in passing; in presence of; away.
part of speech: adverb
Near: passing near: in presence of: aside, away.
part of speech: adverb
Near, present, aside; by and by, after some time.
part of speech: preposition
Next or near to; with; along; over; through; in, on, or at; past and beyond; after.