This is the 408th most frequent Thai word.
เสร
The Thai word "เสร" does not appear to have a standalone meaning; it might be a typo or incomplete.
Here, 'เสร' conveys the idea of being stern or serious, often found in Thai expressions to describe a demeanor or face that is without any sign of amusement.
เธอพูดเรื่องตลกนั้นด้วยใบหน้าเสรจนทุกคนหัวเราะ.
She joked about it with a straight face, causing everyone to laugh.
In this example, 'เสร' is a part of a descriptive compounding expression indicating an extreme or intense manner of an action, such as in fervent laughter.
เด็กน้อยหัวเราะเสรจนน้ำตาไหล.
The little child laughed so heartily that it brought tears.
In this sentence, 'เสร' is part of the colloquial abbreviation 'เสรข้อความ,' representing the act of completing or finishing something in a contextual sense.