perma-
prefix
informal. indicating a fixed state
⇒ 
a perma-tan
⇒ 
perma-grin
perma-
                combining form
     -          permanent or permanently表示“永远的”; “永远地”:
-       women on perma-diets a perma-tanned steward. 
ORIGIN: from perma(nent  adjective 
perma-
Prefix
- permanent, everlasting, eternal
Derived terms
 English words prefixed with perma-