godan verb (-su), transitive verb
grill again; rehash
Literally to grill or cook again over fire; figuratively to rework or rehash existing material, often with a negative nuance of lacking originality.
冷めた魚を焼き直して食べた。
I grilled the cold fish again and ate it.
彼の新作は前の小説
His new work is just a rehash of his previous novel.