Believing that failure leads to success, he continued to challenge himself over and over again.

He starts talking about himself at every opportunity, causing trouble for the people around him.

He likes to take a walk in the park at dusk.

His actions always have a duality.

He holds dual citizenship in America and Japan.

He repelled the enemy using the heavy rattan bow.

Haplology is a part of linguistics, referring to the phenomenon where a part is omitted when the same syllable repeats.

Tritium is one of the radioactive isotopes.

He was criticized for having a double standard.

These shoes have a double sole and are very durable.