1.
INSIDIOUS: (adj) treacherous; sneaky
2.
INSINUATE: (v) to hint; to creep in
3.
INSIPID: (adj) dull; bland
4.
INSOLENT: (adj) arrogant; insulting
5.
INSTIGATE: (v) to provoke; to stir up
6.
INSULAR: (adj) like and island; isolated
7.
INSURGENT: (n) a rebel; someone who revolts against a government
8.
INTEGRATE: (v) to combine two or more things into a whole
9.
INTRACTABLE: (adj) uncontrollable; stubborn; disobedient
10.
INTRANSIGENT: (adj) uncompromising; stubborn
11.
INTRINSIC: (adj) part of the essential nature of something; inherent
12.
INTROSPECTIVE: (adj) to think about oneself; examining one's feelings
13.
INUNDATE: (v) to flood; to cover completely with water; to overwhelm
14.
INVECTIVE: (n) insulting or abusive speech
15.
INVETERATE: (adj) habitual; firm in habit; deeply rooted
16.
IRASCIBLE: (adj) easily angered or provoked; irritable
17.
IRONIC: (adj) meaning the opposite of what you seem to say
18.
IRREVOCABLE: (adj) irreversible
19.
ITINERANT: (adj) moving from place to place
20.
JUDICIOUS: (adj) exercising sound judgement
21.
JUXTAPOSE: (v) to place side by side
22.
KINETIC: (adj) having to do with motion; lively; active
23.
LABYRINTH: (n) maze; something like a maze
24.
LACONIC: (adj) using few words, especially to the point of seeming rude
25.
LAMENT: (v) to mourn
26.
LAMPOON: (v) to satirize; to mock; to parody
27.
LANGUISH: (v) to become weak, listless, or depressed
28.
LARGESS: (n) generous giving of gifts (or the gifts themselves); generosity; philanthropy
29.
LATENT: (adj) present but not visible or apparent; potential
30.
LAUD: (v) to praise; to applaud; to extol; to celebrate
31.
LEGACY: (n) something handed down from the past; a bequest
32.
LETHARGY: (n) sluggishness; laziness; drowsiness; indifference
33.
LEV: lift, light, rise
34.
LEVITY: (n) lightness; frivolity; unseriousness