Peak means (1) a maximum, (2) to achieve a maximum, and (3) to bring to a maximum. Its homophone pique, which is almost exclusively used in the phrase pique [one's] interest, means (1) to provoke or arouse, or (2) to provoke resentment or indignation. It also has a noun sense—namely, a feeling of resentment or indignation resulting from wounded pride. A third homophone, peek, means (1) to glance quickly, (2) to look furtively, or (3) a quick or furtive look.
Examples
Because pique is relatively rare, writers sometimes misuse peak in its place—for example:
Her response peaked my interest, and I asked why would she wish to come back as a man in a next life? [Lake News Online]
So fans, which sport, teams or athletes peak your interest during the spring season? [Albany Times Union]
Peak also mistakenly appears in place of peek—for example:
However, labels can be considered a teaser and sneak peak into what the taste will be like. [Kansas State Collegian]
More than 2,400 people were watching when we took a peak this week … [Columbus Dispatch]
And these writers use peak, peek, and pique correctly:
It peaked with Della famously being photographed dancing to I Will Survive in a skin-tight red dress … [Daily Mail]
The unexpected availability of an experienced playmaker as soon as next month is sure to pique the interest of NRL clubs. [Sydney Morning Herald]
Like a sneak peek into old age, I grunt when I bend and climb stairs in slow motion. [Globe and Mail]
