墾

Kanji: 墾
Level: N1
Meaning: Cultivate, reclaim land
On'yomi: コン
Strokes: 16
Common compounds: 開墾 (かいこん) Reclamation, cultivation 墾田 (こんでん) Newly cultivated land
Memory hook: The 'earth' radical (土) combined with 'solid' or 'firm' (艮 - phonetic and semantic hint for firmness in soil). To 'cultivate' land, you need to firmly work the 'earth.'