(へんせん)

へんせん
noun
transition; change over time
1. transition; change over time; evolution
The process of gradual change and development through history.
To research the evolution of language.
It changed with the passage of time.
歴史(れきし)変遷(へんせん)たどる
To trace the changes through history.

変遷(へんせん) refers to gradual change and evolution over time, typically used when discussing historical or social developments.

WORD FORMATION:
(へん) (change) + (せん) (shift/move) = transition over time

COMMON EXPRESSIONS:

TYPICAL SUBJECTS:

REGISTER:
Formal/academic. Common in scholarly writing and historical discussions.