A diphthong refers to the phenomenon where two vowels are pronounced consecutively within a single syllable.

I am digging soil at the construction site using a hydraulic excavator.

There is a Citrus nobilis tree in my garden.

This ancient document contains semi-vowels that are no longer used in modern Japanese.

She started a special exercise to strengthen her adductor pollicis.

By strengthening the adductor hallucis, you can maintain the health of your feet.

The burial practice in Japan is an important culture that symbolizes family ties.

This mother animal is eating special feed to give birth to healthy offspring.

It's important to learn new words every day to increase your vocabulary.

The final boss of this game is very powerful.