peaked / peeked / piqued 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. 👇
peaked: (adjective) having or rising to a peak.
peeked: NA
piqued: (verb) cause to feel resentment or indignation.
peaked: p·IY·k·t
peeked: p·IY·k·t
piqued: p·IY·k·t
(Examples are Wikipedia snippets under the CC ShareAlike 3.0 license. Definitions drawn from WordNet.)