expression / adjective:

• to be fast at walking and running
• to be quick to spoil (of foodstuffs) - idiom

noun / ~する noun / ~の noun:

• rumination; regurgitation; chewing the cud

noun / ~する noun:

• turning over in one's mind; thinking over something; pondering; musing; rumination (about a subject)

adjectival noun / noun:

• simple; easy; uncomplicated
• brief; quick; light

adjective:

• sharp (blade); pointed
• sharp (pain); stabbing; cutting (remark); stinging; pointed (question or look); screeching (noise)
• perceptive; keen; quick (mind); astute; shrewd; discerning
• nimble; agile; quick

noun / ~する noun:

• electric short-circuit
• drawing a hasty inference between two events; jumping to a quick conclusion; dealing with matters quickly and carelessly

ichidan verb / transitive:

• to transfer (trains); to change (bus, train)
• to change one's mind; to move on to (e.g. a new love interest); to change methods; to change one's way of thinking

noun:

• maneuver (usu. of military force); manoeuvre

noun or verb acting prenominally:

• mobile; nimble; agile; quick to respond ➜ 機動隊

adjective:

• smart; clever
• agile; nimble; quick

adjectival noun / noun:

• diminutive; dwarfish; pygmy; stunted; undersized
• narrow (e.g. thinking); small

~と adverb:

• chattering (teeth) - onomatopoeia

adjectival noun:

• (frozen, worried) stiff - onomatopoeia

adjectival noun / ~の noun:

• rigid (personality, thinking, etc.); inflexible; overly serious - onomatopoeia

adverb / ~の noun:

• voracious (e.g. work, study); without slack or pause - onomatopoeia

ichidan verb / intransitive verb:

• to break; to snap; to be cut; to split; to crack
• to be injured
• to wear out; to be worn out
• to break; to burst; to collapse
• to wear off; to stop working; to go dead
• to expire (time limit, etc.); to run out; to become due
• to run out (of stock, etc.); to be exhausted; to be used up; to be sold out; to be out of
• to be broken off (e.g. of a relationship); to break up; to have severed ties; to be cut off; to be disconnected
• to cut well; to be sharp
• to be sharp-minded; to be keen; to be shrewd; to be quick-witted; to be able
• to be short of; to drop under (a certain figure); to beat (e.g. a record time)
• to dry off
• to curve; to veer
• to shuffle (cards)
• to get angry; to snap; to blow one's top; to lose one's temper; to flip - colloquialism ➜ キレる

auxiliary verb / ichidan verb:

• to be able to do completely - after the -masu stem of a verb - usually written using kana alone

expression:

• as (i.e. in the role of); for (i.e. from the viewpoint of)
• apart from... (used to change the topic)
• even (e.g. "not even a single person") - before a negative form
• thinking that...; trying to... - after a volitional form ➜ とする

noun:

• swallowing in one gulp; downing; mouthful; bite
• sipping; sip
• thinking nothing of one's opponent; making easy prey of someone

adjective:

• fast working - idiom ➜ 手が早い
• fast in forming relationships with women - idiom
• quick to resort to violence - idiom

adverb / ~と adverb / ~する noun:

• flapping (of a flag, fan, etc.); fluttering; whack-whack (e.g. beating dust out of a rug); whap-whap - onomatopoeia

adverb / ~と adverb:

• pitter-patter (of footsteps) - onomatopoeia
• quickly (making progress); in quick succession - onomatopoeia

adjective:

• soft; tender; pliant; supple; limber; limp
• gentle; mild; mellow
• informal; light; flexible (e.g. thinking)