archaic
Definitions
Belonging to an earlier period; ancient or primitive.
No longer in ordinary use; antiquated or obsolete.
Examples
The company's archaic computer system was unable to handle the modern software updates.
Many people find the archaic language used in Shakespearean plays difficult to understand.
It is time to replace these archaic laws with regulations that reflect contemporary society.
Synonyms
obsolete antiquated outdated ancient old-fashioned primitive superannuated