popular  JLPT N3  usually written using kana alone  adverb 

• so to speak, so to call it, as it were

popular  rarely-used kanji form  JLPT N4  noun  noun (generic)  usually written using kana alone 

• wife
• garnish (esp. one served with sashimi), trimmings
• accompaniment, side (remark)

popular  JLPT N1  usually written using kana alone  noun  noun (generic)  noun taking the genitive case particle の  adjective (generic) 

• male (animal, plant)

popular  JLPT N3  noun  noun (generic)  noun or participle taking the aux. verb する  transitive verb  intransitive verb  usually written using kana alone 

• betterment, improvement
• kaizen (Japanese business philosophy of continuous improvement)

popular  JLPT N4  noun  noun (generic)  usually written using kana alone 

• island
• one's territory (e.g. of a sex worker, organized crime gang), one's turf

popular  JLPT N5  noun  noun (generic)  adverb  usually written using kana alone 

• one person
• being alone, being by oneself
• being single, being unmarried
• by oneself, alone
• just, only, simply

popular  JLPT N3  pronoun  colloquial  usually written using kana alone  noun  noun (generic)  adverb  interjection 

• what
• you-know-what, that thing
• whatsit, whachamacallit, what's-his-name, what's-her-name
• penis, (one's) thing, dick
• (not) at all, (not) in the slightest
• what?, huh?
• hey!, come on!
• oh, no (it's fine), why (it's nothing), oh (certainly not)

popular  noun  noun (generic)  usually written using kana alone  archaic 

• face, mug
• surface
• cheek meat
• cheek, cheeks
• surrounding area

popular  JLPT N5  noun  noun (generic)  derogatory  usually written using kana alone  noun (prefix) 

• dog (Canis (lupus) familiaris)
• squealer, rat, snitch, informer, informant, spy
• loser, asshole
• counterfeit, inferior, useless, wasteful

popular  JLPT N5  usually written using kana alone  noun  noun (generic) 

• near, close, beside, vicinity, proximity, besides, while
• third person