This new word is a portmanteau, combining two words.

Please tell me the stem of this word.

His rigid personality sometimes pushes people away.

He has a rigid personality.

The firstling is a special existence for our family.

Living in a place of intense cold is very difficult.

The extent of his vocabulary strength indicates that he is an avid reader.

Goemon is a historical name in Japan.

When is your trip to Santiago?

When you use a negation, the meaning of the sentence is reversed.