This is the 620th most frequent Thai word.
อภ
The Thai word "อภ" means "great," "supreme," or "excellent."
"อภ" is used in "อภิเษก" as a prefix indicating a royal or grand ceremony.
การอภิเษกสมรสในครั้งนี้เป็นประวัติศาสตร์สำคัญ
This royal wedding is a significant historical event.
"อภ" is part of the abbreviation "APEC" which is unrelated to the Thai-specific usage.
เราได้เห็นการประชุมอปในระดับนานาชาติที่สำคัญ
We witnessed the important international "APEC" meeting.
"อภ" here is a prefix in "อภิมหา" denoting something extremely large or grand.