He lamented how his closest friend betray'd him on that fateful night.

Her sudden betrayment shattered the trust we'd built over years.

She documented the betrayments that had cost her the trust of everyone in the village.

If thou betrayest me in this hour of need, our friendship will be broken forever.

He betrayeth his friends only when fear overtakes him.

Her trust was betrayable, and that fear made it hard to form close relationships.

She smiled betrayingly when she saw the surprise gift, unable to hide her excitement.

When I discovered the letter, I realised thou betrayedst our trust.