List: HSK 4

1. circle, round, circular
2. yuan (Chinese currency unit)

1. reflect, mirror
2. respond, react
3. report, feedback

1. concentrate, focus
2. attentive, devoted

1. underground, subterranean
2. underground (illegal or secret activities)

ground, floor, surface

1. light, illumination
2. lighting, stage lighting

honest, truthful, sincere

1. ruler, measuring stick
2. unit of length (approx. 33 cm)

1. meaning, implication, connotation
2. to imply, suggest

free, free of charge, complimentary