peculiar
Pronunciation: /pɪˈkjuːlɪə/
adjective
noun
chiefly British
Origin:
late Middle English (in the sense 'particular'): from Latin peculiaris 'of private property', from peculium 'property', from pecu 'cattle' (cattle being private property). The sense 'strange' dates from the early 17th century

Spelling help
Remember that peculiar ends with -iar.

he looked at her in a rather peculiar way.