When judging unfamiliar customs, remember that all cats are grey by night.

In the dialect study, fieldworkers noted by-form as an alternative form of byform among the regional variants.

The cold competition between the two powers escalated into a dangerous war by proxy in neighboring states.

Sometimes it's nice to sit by one's lonesome and read a book.

We took the old by-path through the woods to avoid the busy road.

When he arrived, I told myself 'don't judge a book by its cover,' and I was surprised to find out how thoughtful he was.

After getting a hit by pitch in the fourth inning, he limped to first base but later stayed in the game.

His hoisted by one's own petard plan collapsed when the incriminating letters were leaked.

He said he'd arrive by'm-by, so we waited.

Many coastal fishermen are concerned about the increasing amount of by-catch affecting marine ecosystems.