To cause to be preceded; to preface; to introduce.
To have higher rank than (someone or something else).
To go before, go in front of.
Brief editorial preface (usually to an article or essay)
To ask for; to solicit; to beseech.
To try to acquire or gain; to strive after; to aim at.
To try to find; to look for; to search for.
To try to reach or come to; to go to; to resort to.
To navigate through a stream.
To attempt, endeavour, try
The operation of navigating through a stream.