avid	very enthusiastic (for people)
blatant	very obvious, done without shame or embarrassment (used to describe bad things)
breathtaking	very beautiful, surprising or impressive
gripping	very exciting; for films and books
harrowing	shocking, making you feel very upset (not used to describe people)
lax	not strict or not careful enough (for safety measures, security, morals, discipline, laws, etc.)
lenient	not strict; used to describe people in a position to punish (parents, teachers, etc.)
meteoric	very sudden and quick (generally used with the noun rise)
misleading	giving the wrong idea or impression
piercing	loud and high-pitched (for noises)
prolific	producing a large number of works (for artists, composers and writers)
sporadic	happening at irregular intervals
staunch	very loyal
sweeping	too general and therefore not valid (for statements and generalisations); large and affecting everyo
waterTight	impossible to prove wrong or argue against
dreary	boring and depressing
dull	boring, without life, excitement or colour
mundane	ordinary, boring, giving little satisfaction, often used to describe jobs
tedious	boring, and often frustrating
atrocious	extremely bad
dreadful	very bad
lousy	(informal) very bad
flawless	perfect, with faults
impeccable	perfect, faultless
unblemished	sth that has not been spoilt or harmed
arduous	tiring and involving a lot of effort
gruelling	tiring and lasting a long time
strenuous	needing a lot of physical effort
bedraggled	untidy, dirty and wet (for people)
dishevelled	untidy
scruffy	untidy (for people/places); old and worn out (for clothes)
astute	clever at understanding people and situations
crafty	clever and good at using deception to achieve success
shrewd	clever and showing good judgement of other people and situations
wily	clever, experienced at deceiving people and not easily deceived (for people-behaviour)
conventional	ordinary, normal
mainstream	ordinary, conventional, neither strange nor extreme
middle-of-the-road	ordinary, not extreme
run-of-the-mill	ordinary, nothing special