She has trypophobia, and feels discomfort when she sees things with many holes like beehives or corals.

In set theory, the symmetric difference indicates the difference between two sets.

He is good at solving technical problems.

He always has an optimistic attitude.

His music is very avant-garde, and some people might not understand it.

He is facing economic problems.

This word is etymologically derived from Latin.

Looking at this kanji graphically etymologically, its shape represents its meaning.

Japanese history had a feudal social structure for a long time.

He often acts selfishly.