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効 

Stroke count: 8
Meanings: merit, efficacy, efficiency, benefit
Readings: き.く, ききめ, コウ, なら.う

Vocab lookup:

Level 2 vocabulary
効く	(v5k) to be effective/ (P)
効果	(n,adj-no) effect/ effectiveness/ efficacy/ result/ (P)
効力	(n) effect/ efficacy/ validity/ potency/ (P)
無効	(adj-na,n) invalid/ no effect/ unavailable/ (P)
有効	(adj-na,n) validity/ availability/ effectiveness/ (P)
Level 1 vocabulary
効き目	(n) effect/ virtue/ efficacy/ impression/ (P)
効率	(n) efficiency/ (P)

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