pre-noun adjectival
Obsolete pre-noun adjectival (rentaishi) meaning 'past' or 'bygone'. Found in classical Japanese, often in set phrases like 往にし方 (いにしえ). Not used in modern speech.
往にし方の思い出にふける。
I indulge in memories of bygone days.
いにし世の物語を読むのが好きだ。
I like reading tales of the olden world.