"migrate" in the verb sense
1. migrate, transmigrate
move from one country or region to another and settle there
"Many Germans migrated to South America in the mid-19th century"
"This tribe transmigrated many times over the centuries"
move periodically or seasonally
"birds migrate in the Winter"
"The workers migrate to where the crops need harvesting"
Source: WordNet® (An amazing lexical database of English)
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