ゆらめき

かえる

to return home, to go back

I studied after my friend went home.

Specifically means returning to one's home or origin point. Different from 戻る (もどる) which is more general 'return/go back'. Also different from 返る (かえる) which means 'to be returned' (intransitive).

わすれる

to forget; to leave behind; to lose consciousness of

I forgot about the promise.

忘れる is a ru-verb (ichidan verb) meaning to forget. Can be used for forgetting memories, information, objects left behind, or neglecting to do something. Often used with 〜てしまう to express regret about forgetting. 忘れ物 (forgotten item) is a common related word.

to flicker; to waver; to shimmer

The candle flame is flickering in the wind.

Describes the slow, irregular movement of light, shadows, or long objects like seaweed in water.

thing, matter, fact, circumstance

Studying every day is necessary.

Used to nominalize verbs and adjectives. Also used to express abstract concepts, as opposed to もの which refers to physical objects. Often used in set phrases and formal writing.

possessive particle indicating belonging, attribution, or relationship

Mother's cooking is the most delicious.

Connects two nouns to show possession or attribution. The modifying noun comes before の, and the modified noun comes after. Can also connect clauses when nominalizing.

not exist, not have; negative auxiliary

There's no time, so hurry.

ない functions as both an adjective meaning 'nonexistent' and as the negative form of ある. Also forms negative verbs when attached to verb stems. Conjugates like an i-adjective.

あい

love; affection

A parent's love for their child is irreplaceable.

A broad term for deep affection toward people or things.

direct object marker particle

I solved a difficult problem.

Marks the direct object of a verb - what the action is done to. Written を but pronounced 'o'. Essential for transitive verbs. Also marks the space through which movement occurs.