IPA: /ˈspɒtɪli/
KK: /spɑtɪli/
In a way that is uneven or inconsistent, often with gaps or irregularities.
The service at the restaurant was spottily attentive, with some waiters being very helpful while others were not.
Spottily → It is formed from "spot" (from Old English *spt*, meaning a mark or stain) and the suffix "-ly" (meaning in a manner of). The word "spottily" means in a manner characterized by spots or marks, often implying inconsistency or irregularity.
Think of 'spots' as marks or irregularities, and remember that 'spottily' describes something that happens in a marked or inconsistent manner.