in·do·lent 
(ĭndə-lənt)
(ĭndə-lənt)adj.
1.
a. Disinclined to exert oneself; habitually lazy. See Synonyms at lazy.
b. Conducive to inactivity or laziness; lethargic: humid, indolent weather.
2.
a. Causing little or no pain: an indolent tumor.
b. Slow to heal, grow, or develop; inactive: an indolent ulcer.
[Late Latin indolēns, indolent-, painless : Latin in-, not; see IN-1 + Latin dolēns, present participle of dolēre, to feel pain.]
indo·lent·ly adv.