away / aweigh are similar-sounding terms with different meanings (referred to as homophones). To better understand the differences, see below for definitions, pronunciation guides, and example sentences using each term. 👇
away: (adjective) not present; having left. (adjective) used of an opponent's ground. (adjective) (of a baseball pitch) on the far side of home plate from the batter. (adverb) from a particular thing or place or position (`forth' is obsolete). (adverb) from one's possession. (adverb) out of existence; ; - H.E.Scudder. (adverb) indicating continuing action; continuously or steadily. (adverb) so as to be removed or gotten rid of. (adverb) freely or at will. (adverb) in or into a proper place (especially for storage or safekeeping). (adverb) in a different direction.
aweigh: (adjective) (used of an anchor) hanging clear of the bottom. (adjective) (of an anchor) just clear of the bottom.
away: ah·w·EY
aweigh: NA
(Examples are Wikipedia snippets under the CC ShareAlike 3.0 license. Definitions drawn from WordNet.)