"Everywhen" is a rare adverb meaning "always" or "at all times," often used with "everywhere" (e.g., "everywhere and everywhen") to emphasize timelessness or universality, describing something that happens constantly or transcends specific moments. It implies that an event or truth applies not just in one place or time, but across all possibilities, suggesting an eternal present where past, present, and future coexist, common in philosophical, spiritual, or speculative contexts like sci-fi.