IPA: /ˈsʌmtaɪmz/
KK: /ˈsʌmˌtaɪmz/
On certain occasions; not always but occasionally.
Sometimes I like to go for a walk in the evening.
Sometimes → It is formed from "some" (from Old English "sum", meaning a certain amount or number) and "times" (from Old English "tima", meaning a period or interval). The word "sometimes" means at certain times or on some occasions.
Think of a 'certain amount' ('some') happening at 'periods' ('times') — that's why sometimes means at certain times.
No commonly confused words.