withdrawal from the society

Is it related with mental illness, If yes then it is due to depression and schizophrenia and is one of the symptom.

Lawful wedlock between two persons imposes an obligation on both the spouses to cohabit with each other and live with each other.The expression "withdrawal from the society" means cessation of cohabitation, to bring an end to consortium.

The 'society' here, means the same thing as cohabitation. Refusal to live with other spouse, refusal for marital intercourse, refusal to give company and comfort to each other all amounts to withdrawal from the society.

I agree with Suchitra and add one thing.  If the withdrawal from the society is for a reasonable cause, It does not attract the decree of divorce or restitution of conjugal rights.  For example, a wife withdraws from the society of husband to escape physical or mental or financial abuse, that withdrawal is for a reasonable cause.