rescind • \ri' sind\ • verb

Cancel officially

• Example sentence: NY officials rescind mandatory H1N1 flu shot order.

• What I was doing wrong? : Before i came across this word, most probably i would have used 'canceled' which is partially correct but until i came to knew the meaning of this word I was not able to understand the meaning of example sentence given above, when i read it on Google news on Oct 23, 2009.

deliquesce • \del-ih-KWESS\ • verb

1*: to dissolve or melt away
2 : to become soft or liquid with age or maturity -- used of some fungal structures (as the gills of a mushroom)

• Example sentence: Someone forgot to put the butter back in the refrigerator, instead leaving it to deliquesce on the kitchen counter.

• What I was doing wrong? : Before i came across this word, most probably i would have used 'dissolve' or 'melt' e.g. instead leaving it to dissolve/melt on the table.
I guess both are equally unappropriate :)

* Indicates the Meaning which is used in the example sentence

verdigris • \VER-duh-greess\ • noun

a green or bluish deposit especially of copper carbonates formed on copper, brass, or bronze surfaces

• Example sentence: It seems like every building on campus features some combination of brick, ivy, and verdigris.

• What I was doing wrong? : Most probably i would have used 'copper rust' or simply 'rust'. Had No choices dude, can't help it :)