观测
guāncè · HSK 7
observe
🔭 观测 = 观 observe + 测 measure: to watch and take measurements
观 (guān) means observe or view; 测 (cè) means measure or gauge. Together they mean scientific observation, like tracking weather or stars and recording the data.
测 — water radical 氵 + 则 (rule/standard)
测 combines the water radical 氵, hinting at meaning, with 则 (rule, standard), which also supplies the sound. Originally it referred to gauging the depth of water, then broadened to mean measuring, surveying, or testing in general.