noun
Refers to one's spouse's parents. Neutral term used in formal and everyday contexts.
義両親と同居しています。
I live with my parents-in-law.
義両親に初めて会う日は緊張した。
I was nervous on the day I first met my parents-in-law.
Specifically 'mother-in-law', while 義両親 refers to both parents-in-law.
Compound of 義 (ぎ, 'in-law, non-blood relationship') and 両親 (りょうしん, 'parents').