おか・丘・岡・壟・陸符oka[0]heiban (flat)

1. nounhill; height; knoll; rising ground
   その丘おかは見晴みはらしがよい。↗

   The hill commands a fine view.
2. noun, mahjongbonus points awarded to the winner at the end of a game

• Synonym丘陵きゅうりょうWrittenA written-style geographic term for stretches of rolling, continuous low hills, as in 「多摩丘陵」; it covers a broader area than a single 「丘」.
• Antonym谷たにNeutralA valley — low ground between raised sides; it sits at the opposite end of the elevation scale from a raised 「丘」.
• Antonym平地へいちNeutralFlat, level ground, the opposite of the raised 「丘」; seen in phrases like 「平地に住む」.

Use 「丘」 for a single small hill. Choose 「丘陵」 for extensive rolling hill country in geographic or written contexts, 「谷」 for low-lying ground between heights, and 「平地」 for flat land.

Usage comparisons are AI-assisted and cross-checked by multiple models; for study reference only

1. （おか）周囲しゅういに比くらべ小高こだかくなっている土地とち。