inner vessel / tank / tub [written and colloquial]; male underwear [colloquial]

coward; timid (spoken)

someone who wants to do something that defies the norm of the society but he / she is too afraid to do so

coward

to make the worst choice after picking out of so many options [colloquial]

to scare the wits out of

one who is extremely familiar with the surroundings; a local

noun; starter, such as fluorescent lamp starter

to boost one's courage; embolden

daring or brave enough

brave enough to die, it is used to describe one's extreme bravery

courageous

Light bulb (white, milky color)

adj; fearless; brave; courageous

solon hero

verb; trembling. Describes being very afraid

Loyal and brave with integrity

energy-saving light bulb

be very frightened

to dare / make a bet with someone (usually to pick a fight)

scary

to act with courage

a brain trust; a think tank; referring to those who come out with the plans and ideas

(idiom) 1. Blatant; 2. Blatantly

describes a person who is very daring in doing something

sea urchin

cowardly

gutless; a coward

(noun) a light bulb

bold; daring [colloquial]