垄

Two semantic clusters. (1) Agriculture — the original meaning, a ridge of earth heaped up between or along furrows in a field. As a measure word, 一垄玉米 = 'one row of corn'. Compounds: 田垄 (field ridge), 瓦垄 (the ridges on a tiled roof — same shape). (2) Modern economic — 垄断 (monopoly, to monopolise) and 反垄断 (anti-monopoly) are now the most common reasons learners meet 垄. The metaphor: a market 'mounded up' and held by one party, blocking access for others. The phrase comes from Mencius (《孟子》) — a tax-evading merchant climbed a high ridge (垄断) to spot all the customers from above.

The Mencius parable: a merchant who tried to corner the market by climbing the highest mound in the marketplace to see every buyer first. The phrase 登垄断而望 ('climbed the ridge to look out') became 垄断 = 'to monopolise', literally 'to hold the high ground'. A 2,300-year-old metaphor still used in EU and Chinese competition law.