| A | B |
|---|
| estuary | arm of the sea that extends inland to meet the mouth of a river. |
| rubble | loose mass of rocks |
| bulwark | wall raised as a defensive fortification |
| unsubstancial | lacking material substance or strength |
| mirage | optical illusion of distant objects,often water |
| undulating | moving in a smooth, wave-like motion |
| obsecured | not easily noticed or seen |
| perceptible | capable of being perceived by the senses or the mind |
| tactful | able to speak or act without offending |
| speculatively | considering a subject thoughtfully |
| illusions | erroneous perceptions of reality |
