re·pel·lent also re·pel·lant 
(rĭ-pĕlənt)
(rĭ-pĕlənt)adj.
1. Inspiring aversion or distaste; repulsive. See Synonyms at hateful, offensive.
2. Resistant or impervious to a substance. Often used in combination: a water-repellent fabric.
3. Serving or tending to repel something, especially insects: a repellent spray.
n.
Something that repels, especially:
a. A substance used to repel insects.
b. A substance or treatment for making a fabric or surface impervious or resistant to something else.
re·pellence, re·pellen·cy n.
re·pellent·ly adv.