fibrous
fi.brous \'fi--br*s\ aj [F fibreux, fr. fibre fiber, fr. L fibra] 1a:
containing, consisting of, or resembling fibers 1b: characterized by
fibrosis 1c: capable of being separated into fibers {a ~ mineral} 2:
TOUGH, SINEWY - fi.brous.ly av
Webster's English Dictionary