guide / guyed 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. 👇
guide: (noun) someone who shows the way by leading or advising. (noun) a structure or marking that serves to direct the motion or positioning of something. (verb) be a guiding or motivating force or drive. (verb) use as a guide. (verb) pass over, across, or through.
guyed: (verb) steady or support with a guy wire or cable.
guide: g·AY·d
guyed: NA
(Examples are Wikipedia snippets under the CC ShareAlike 3.0 license. Definitions drawn from WordNet.)