pew / piu 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. 👇
pew: (noun) long bench with backs; used in church by the congregation.
piu: NA
pew: p·y·UW
piu: NA
(Examples are Wikipedia snippets under the CC ShareAlike 3.0 license. Definitions drawn from WordNet.)