intransigent uncompromising
introspection examining one's own thoughts and feelings
invective abusive language， curses
inveigle trick by using flattery， deception
inveterate deep-rooted. long-established
irate angry
ire anger
irksome tiresome
irrelevant not relevant， not connected
irrevocable final and unalterable
itinerary plan for a journey， details or records of a route
jabber talk excitedly； utter rapidly
lackluster （of eyes） dull
lag go too slow
latent present but not yet active， developed or visible
laudatory expressing or giving praise
lavish giving or producing freely， liberally or generously
leakage the process of leaking
lien legal claim until a debt on it is repaid
limp lacking strength， walking unevenly
loll rest， to sit or stand in a lazy way； hang （dog's tongue）
loquacious talkative
lubricant substance that makes work easier
lubricate put oil to make work easily
lugubrious dismal， mourful；
lull become quiet or less active
luminary star， light-giving body
macabre gruesome， suggesting death
maladroit tactless， clumpsy
malapropism misuse of a word （for one that resembles it）
malign injurious， speak ill of smb， tell lie
martial brave， of associated with war
cruel killing of a large number of people
matriculation be admitted， enter a university as a student
mature come to full development， to a state ready for use
mendacious false
mercurial lively， quick-witted； inconsistent， changeable
meretricious attractive on the surface but of little value
mischievous harmful， causing mischief
miser person who loves wealth and spends little
missile smth that is thrown or shot
moderation quality of being limited， not extreme
mollify make calmer or quiter
molt moult， lose hair， feathers before new growing
morbid diseased， unhealthy （eg. about ideas）
morose ill-tempered， unsocial
