IPA: /ˈbʌmpiɪst/
KK: /ˈbʌmpɪəst/
This word describes something that has many bumps or uneven surfaces, more than anything else that is also bumpy.
The road was the bumpiest I had ever driven on, making the ride very uncomfortable.
Comparative: bumpier
Superlative: bumpiest
Bumpiest → It is formed from "bump" (of uncertain origin, possibly imitative of the sound) and the suffix "-iest" (meaning most). The word "bumpiest" describes the state of having the most bumps or irregularities.
Think of the word 'bump' which suggests a raised area or irregularity, and remember that 'bumpiest' means having the most of those raised areas.
No commonly confused words.