おやじ・親父・親爺・親仁oyaji[0]heiban (flat)

1. nounone's father; one's old man; dad; pops
   親父おやじはじっと私の顔かおを見みた。↗

   Father looked me full in the face.
2. nounmiddle-aged (or older) man; old man; geezer
3. nounone's boss
4. nounproprietor (of a restaurant, store, etc.); landlord
5. noungrizzly bear

• Synonymお父さんおとうさんNeutralThe most common everyday word for dad; 「親父」 is more casual and used mostly by grown men.
• Synonym父ちちNeutralUsed when speaking to outsiders about your own father, in speech or writing; 「親父」 is a casual term used mainly by adult men.
• Synonym父親ちちおやNeutralA neutral, objective word for father; 「親父」 adds an affectionate, rough-edged flavor.
• Synonym父さんとうさんCasualColloquial for dad, more casual than 「お父さん」; 「親父」 is rougher still.
• Synonymお父様おとうさまFormalFormal, respectful term for one's own or someone else's father; 「親父」 is a man's casual way of referring to his own dad.
• Synonym父上ちちうえFormalFormal, old-fashioned honorific for one's father, as in 「父上様」; 「親父」 is a casual, familiar term.
• Synonym父君ふくんFormalA formal honorific for someone else's father; 「親父」 is a casual term.
• Related男親おとこおやNeutralMeans a male parent, used when contrasting with the mother; 「親父」 is a form of address.
• Related乃父だいふWrittenWritten, archaic word for another person's father or for fathers in general; not used in daily conversation.
• RelatedファーザーCasualA loanword for father, also used for a priest; rare in everyday speech.
• Antonym若い者わかいものNeutralYoung people or young workers; opposite in age to 「親父」 in its old-man sense.
• Antonym若衆わかしゅWrittenWritten word for a young person; the age opposite of the older-man sense of 「親父」.

A grown man's casual word for his own father, or for a middle-aged or older man. For everyday address use 「お父さん」 or 「父さん」; when speaking to outsiders about your father, use 「父」; for a respectful tone, 「お父様」. The age opposites are 「若い者」 and 「若衆」.

Usage comparisons are AI-assisted and cross-checked by multiple models; for study reference only

1. 父親ちちおや。