セツ 
お.る おり お.り -お.り お.れる 
() fold () break
      
おり (n-adv,n-t) chance, suitable time
おりおり (adv,n) occasionally
おりから (exp,n-t) (1) just then, at that time, right then, at that moment, (2) appropriate moment
おりあい (n) mutual relations, compromise
おりがみ (n) origami (paper folding)
おりたたみ (n) folding (desk, chair)
おりかえし (adv) (1) by return, (call or write back) without delay, (n,adj-no) (2) lapel, cuffs, flap, (3) chorus, refrain, (4) repetition, (5) aliasing (in imaging), (6) shuttle service, (7) (comp) back-to-back, BTB, (8) wrapping (text on computer screen), wrap
おりかえす (v5s,vt) (1) to turn up, to fold back, (2) (comp) to loopback (a signal, a message)
おる (v5r,vt) to break, to fold, to pick flowers
おれる (v1,vi) to break, to be folded, to give in, to turn (a corner)
せっかく (adv,n) (uk) with trouble, at great pains, long-awaited
おりがみ (n) origami (paper folding)
せっしょう (n,vs) negotiation
せっちゅう (n,vs,adj-no) compromise, cross, blending, eclecticism
せっぱん (n,vs) half, division

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Etymologies: 中文字譜 : 説文解字