abstruse　obscure; profound; difficult to understand
abusive　coarsely insulting; physically harmful
abut　 border upon; adjoin
abysmal　bottomless
abyss　enormous chasm; vast bottomless pit
academic related to a school; not practical or directly useful
everbuying scam accede　agree
accelerate move faster
accessible easy to approach; obtainable
accessory additional object; useful but not essential thing
acclaim applaud; praise; greet with great approval; announce with great approval; Ex. The new drung has been acclaimed as the most important discoveries for years; N: strong expression of approval and praise
acclimate everbuying scam adjust to climate or environment; adapt
acclivity　sharp upslope of a hill; OP. declivity