彼(かれ)は肉親(にくしん)の支(ささ)えを受(う)けずに、長年一人(ながねんひとり)で暮(く)らしてきた。

He has lived alone for many years without the support of his blood relatives.

彼女(かのじょ)は肉親(にくしん)の消息(しょうそく)を長年知(ながねんし)らずにいた。

She had not known the whereabouts of her blood relatives for many years.

肉親(にくしん)