* Often: This is the most common and direct opposite of "seldom," meaning "frequently" or "many times."
* Always: This means "every time" or "without exception," indicating a complete absence of rarity.
* Frequently: This is similar to "often" but implies a higher level of regularity.
* Usually: This suggests that something happens most of the time but not always.
* Regularly: This implies a consistent and predictable occurrence.
The best opposite word will depend on the specific situation and the nuance you want to convey.