This elderly adjective stems from the similar Latin adjective rugosus meaning, well, the same. The Latin noun ruga simply means ‘wrinkle’.
Why this word?
As an aging woman (I will soon [very soon] turn 28!), I can tell you that women give their wrinkles (their temporary lack, their slow appearance or vivid existence) a whole lot of thought. Maybe, just maybe, giving another word for it would refresh this line of thinking. Or maybe it won’t… Let me know.
How to use the word rugose?
Rugose is an adjective, synonymous to ‘wrinkled’; simply use it as such.
“Oh I can remember the days in which my bright smile was the only feature decorating my face… Nowadays, it is still there, hidden amongst my rugose skin…”
“Mother! What are you talking about?? You are not rugose and you don’t need to get a plastic surgery!”