| perennially frozen ground; pergelisol; permafrost; permanently frozen ground | ชั้นดินเยือกแข็งคงตัว [ธรณีวิทยา๑๔ ม.ค. ๒๕๔๖] |
| perennially |
| perennially |
| perennially | (adv) in a perennial manner; repeatedly, Example: We want to know what is perennially new about the world |
| Perennially | adv. In a perennial manner. [ 1913 Webster ] |