Allay verb : to remove or lessen emotional feeling such as fear or worry, from the mind so as to feel as normal as possible;
The government is trying to allay public fears about the spread of the Swine flu.
Apprehension, noun: worry about the future, or a fear that something unpleasant is going to happen
There is some apprehension in some quarters about who the next chief minister will be.
Slippage, noun: a reduction in the rate, amount or standard of something
The opposition party is concerned at the slippage (= loss of popularity) as reflected in the last general election.
Sensitize, verb: to make someone sensitive/aware to/of something
The electronic media is very often trying to sensitize non-issues..
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