peculiar: [15] The etymological notion underlying peculiar is of ‘not being shared with others’, of being ‘one’s own alone’. It was borrowed from Latin pecūliāris ‘of private property’, a derivative of pecūlium ‘private property’, which in turn was based on pecus ‘cattle’, hence ‘wealth’ (source also of English pecuniary [16]). (A parallel semantic progression from ‘cattle’ to ‘property’ is shown in English fee.) The development of the adjective’s meaning from ‘belonging to oneself alone’ through ‘individual’ to ‘extraordinary, strange’ took place in Latin. Peculate ‘pilfer, embezzle’ [18] also comes ultimately from Latin pecūlium. => pecuniary
