persistent (
http://definr.com/persistent)
adj 1: never-ceasing; "the relentless beat of the drums" [syn:
relentless,
unrelenting]
2: continually recurring to the mind; "haunting memories"; "the
cathedral organ and the distant voices have a haunting
beauty"- Claudia Cassidy [syn:
haunting]
3: (biology) retained; not shed; "persistent leaves remain
attached past maturity"; "the persistent gills of fishes"
[syn:
lasting] [ant:
caducous]