relieve; calm; soothe;
to reduce and fear or worry
He is wearing a helmet and that should allay your worry about him riding a bicycle.
Remember: Allay reminds us of lay. We lay something away and no longer see it.
Or: We lay something down and no longer carry it.
Used at work:
I prepared well for this meeting so allay any thought that it won't go well.
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(c) 2014 E. Carruthers