IPA: /ˈpiːkiər/
KK: /ˈpikēər/
Having more peaks or points than something else; sharper or more pronounced in shape.
The mountain looked peakier than the others in the range.
Comparative: peakier
Superlative: peakiest
'Peakier' is derived from 'peak' (from Middle English 'peke', meaning a pointed top or summit) and the suffix '-ier' (meaning more). The word 'peakier' describes something that is more pointed or has a sharper summit than something else.
Think of a 'peak' as a sharp top or summit, and remember that 'peakier' means more pointed or sharper than another.