Is group sum just antonym?

Group sum is not antonym. The antonym of group is stem. The antonym of only is double, right. The pinyin of the group is qún, which originally refers to the gathering of livestock in one place, generally refers to the gathering of the same kind, and is extended to the meaning of numerous and collective. Also used as a quantifier, referring to a group of people or animals, etc. From:

1, "The Book of Songs" Xiaoya auspicious day: "Or groups or friends."

2, "Book of Rites under Quli": "The doctor does not cover it."

3. On the Book of Rites Tan Gong: "I live alone."

Usage: as an attribute, adverbial.

The only pinyin is ZH: and zhǐ, which are only found in Oracle Bone Inscriptions in Shang Dynasty. If you know this word, you will catch the meaning when you combine them. The original meaning was just "a bird", and later it was extended as a quantifier, not limited to birds. From:

1, Wang Song Anshi's "Wang Wen Xie Zhou": "I am happy when I come, but I am sad when I go!"

2. Tang Xueneng's "After the History": "What happened to Zhuge Cheng at that time? Only be Wolong for life. "

3. Tang Hanyu's "Sacrifice to Twelve Lang Wen": "The two worlds are one, solitary."

Usage: as an attribute, adverbial.

Synonym: only