lui aurais

would have ... to him/her

→ lui
phrase Rare #35,159
would have ... to him/her Usually followed by a past participle, forming the conditional perfect: je lui aurais parlé means “I would have spoken to him/her.” Lui can refer to either a male or female person.
FR: Je lui aurais écrit, mais je n'avais pas son adresse.
EN: I would have written to him/her, but I didn't have their address.

Je lui aurais craché au visage.

I would have spat in his face.

— Oppenheimer (2023)

Si j'avais su que Tom était à l'hôpital, je lui aurais rendu visite.

If I had known that Tom was in the hospital, I would have visited him.

Je lui aurais expliqué, il m'aurait peut-être pardonnée.

If I had explained it to him, he might have forgiven me.

— Andhadhun (2018)

S'il m'avait dit la vérité, je lui aurais pardonné.

If he had told me the truth, I would have forgiven him.

Si je l'avais su, je ne lui aurais jamais dit de telles choses.

If I had known, I would never have said such things to him/her.

Sans frère Bhagwati, je lui aurais brisé le crâne.

If it weren't for Brother Bhagwati, I would have cracked his skull open.

— The Legend of Bhagat Singh (2002)

Jamais je ne lui aurais fait de mal.

I would never have hurt him.

— Reconnu coupable (2026)