We will never know if he told the truth, because dead men tell no tales.

His words reminded me of the proverb 'good advice may be uncomfortable to hear.'

The urban legend of the slit-mouthed woman terrifies children.

By training the orbicularis oris muscle, your expressions become more expressive.

She was a secret kunoichi (female ninja).

He threw a handful of sand into the sea.

"Once in a lifetime" means to cherish the encounter that happens only once in one's lifetime.

He missed a once-in-a-lifetime opportunity.

He was focused on his work all day long.

One day, he suddenly decided to go on a journey.