scrupulous (adj.)

cautious in action for fear of doing wrong

scurrilous (adj.)

grossly indecent or vulgar

sedate (adj.)

even-tempered

seditious (adj.)

promotive of conduct directed against public order and the tranquillity of the state

sedulous (adj.)

persevering in effort or endeavor

selective (adj.)

having the power of choice

senile (adj.)

peculiar to or proceeding from the weakness or infirmity of old age

sensuous (adj.)

having a warm appreciation of the beautiful or of the refinements of luxury

sentient (adj.)

possessing the power of sense or sense-perception

sequacious (adj.)

ready to be led

shrewd (adj.)

characterized by skill at understanding and profiting by circumstances

somber (adj.)

gloomy

somnolent (adj.)

sleepy

spasmodic (adj.)

convulsive

staid (adj.)

of a steady and sober character

 stingy (adj.)

 cheap, unwilling to spend money

stolid (adj.)

 expressing no power of feeling or percieving

 stringent (adj.)

 rigid

 studious (adj.)

 having or showing devotion to the acquisition of knowledge

 subservient (adj.)

 servilely following another's behests