English word boil comes from Proto-Indo-European *bʰōw-, Proto-Indo-European *bʰl̥no-, Proto-Indo-European *bʰew-, Proto-Indo-European *bʰil-, and later Proto-Germanic *bulô (Bull.)
| Dictionary entry | Language | Definition |
|---|---|---|
| *bʰōw- | Proto-Indo-European (ine) | to swell, inflate, to blow, swell , to dwell |
| *bʰl̥no- | Proto-Indo-European (ine) | |
| *bʰew- | Proto-Indo-European (ine) | |
| *bʰil- | Proto-Indo-European (ine) | decent, good, decent, good, harmonious, friendly |
| *bulô | Proto-Germanic (gem-pro) | Bull. |
| *būlō | Proto-Germanic (gem-pro) | Boil; sore. |
| *būlǭ | Proto-Germanic (gem-pro) | Swelling; bump; boil. |
| *biliz | Proto-Germanic (gem-pro) | Decent, fair, equitable. Kind, gentle, merciful. |
| bula | Old English (ang) | |
| bile | Old English (ang) | |
| *būlijǭ | Proto-Germanic (gem-pro) | |
| bȳl | Old English (ang) | |
| bule | Middle English (enm) | |
| boil | English (en) | A localized accumulation of pus in the skin, resulting from infection. |