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単 

Stroke count: 9
Meanings: simple, one, single, merely
Readings: タン, ひとえ

Vocab lookup:

Level 3 vocabulary
簡単	(adj-na,n) simple/ (P)
Level 2 vocabulary
単位	(n) unit/ denomination/ credit (in school)/ (P)
単語	(n) word/ vocabulary/ (usually) single-character word/ (P)
単純	(adj-na,n) simplicity/ (P)
単数	(n) singular (number)/ (P)
単なる	(adj-pn) mere/ simple/ sheer/ (P)
単に	(adv,n) simply/ merely/ only/ solely/ (P)
Level 1 vocabulary
単一	(adj-na,n) single/ simple/ sole/ individual/ unitory/ (P)
単調	(adj-na,n) monotony/ monotone/ dullness/ (P)
単独	(adj-no,n) sole/ independence/ single/ solo (flight)/ (P)

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