This is the 3817th most frequent Japanese word.
むかし
Long ago; ancient times.
The term "昔" is used here to denote 'a long time ago' or 'in the past,' marking the setting of the sentence in a historical or past timeframe.
昔、おばあさんと一緒に山に行きました。
Long ago, I went to the mountains with my grandmother.
Here, "昔" is used as a descriptive attributive to highlight that the movies are from the past, emphasizing its use to denote historical or traditional qualities.
昔の映画には独特の魅力があります。
Old movies have a unique charm.
In this example, "昔" is used as a time reference point for comparison, suggesting improvement or change over time.