expression:

• hindsight is 20-20 (even for a fool); an afterwit is everybody's wit - proverb

expression:

• hindsight is 20-20 (even for a fool) - obscure term ➜ 下種の後知恵

ichidan verb / intransitive verb:

• to play dumb; to feign ignorance; to play innocent; to have a blank facial expression
• to play the fool
• to be in one's dotage

ichidan verb / intransitive verb:

• to fall down (e.g. off a chair); to slip down (e.g. one's eyeglasses); to slide down
• to make a fool of oneself
• to whoop it up; to be on the spree; to cut loose; to mess around

noun:

• April Fools' Day
• April fool

noun / adjectival noun:

• extreme foolishness; grave stupidity

noun:

• big fool; damn idiot; utter fool

noun:

• dotage
• feeble-minded old man; senile old fool; dotard

godan ~む verb / intransitive verb:

• to feel comforted; to be in good spirits; to feel better; to forget one's worries

godan ~む verb / transitive:

• to trifle with; to fool around with

expression / godan ~く verb:

• to pull out nostril hairs
• to outwit; to fool

ichidan verb / intransitive verb:

• to joke; to jest; to kid; to josh
• to make fun of; to laugh at; to play a prank
• to romp; to gambol; to frolic; to frisk; to mess around; to fool around; to screw around
• to neck; to make out

godan ~す verb / transitive:

• to conceal (oneself); to hide; to abscond
• to deceive; to dissemble; to fool