Environmental prefix
The crossword clue "Environmental prefix" is answered by ECO, a 3-letter entry. Used 114 times across 37 distinct years; most recently in 2026. It appears in 30 publications in the xd corpus. Every figure on this page comes from the pilot data itself.
The answer
ECO
3 letters. See every clue for this answer on the ECO answer page.
Used 114 times across 37 distinct years; most recently in 2026. It appears in 30 publications in the xd corpus. Frequency and last-seen figures come from the xd crossword corpus only.
Other answers for this clue
The same clue has also been answered these ways in the xd corpus. Answers inside this pilot link to their own answer page.
- ATMO (1 uses in xd)
- SGS (1 uses in xd)
Other clues for ECO
Every other clue in this pilot answered by ECO, most used first.
- Green prefix - used 431 times, most recently in 2026
- Author Umberto - used 184 times, most recently in 2026
- Earth-friendly prefix - used 181 times, most recently in 2026
- "The Name of the Rose" author - used 77 times, most recently in 2025
Related clues
Pilot clues of the same answer length that share a word with this clue, or match its answer pattern when no word is shared. Most used first.
- Prefix with center - EPI, used 134 times
- Equal: Prefix - ISO, used 123 times
- Recent: Prefix - NEO, used 120 times
- Prefix with natal - NEO, used 100 times
- Prefix meaning "three" - TRI, used 91 times
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