IPA: /ˈtaɪmliər/
KK: /ˈtaɪmliːər/
More suitable or appropriate for the time; occurring at a favorable or advantageous moment.
The report was submitted in a timelier manner this year compared to last year.
Comparative: timelier
Superlative: most timely
Timelier → It is formed from "time" (from Old English "tima", meaning a period or duration) and the suffix "-ly" (meaning in a manner of). The word "timelier" means in a manner that is more appropriate or suitable for a particular time.
Think of 'time' as a period and remember that 'timelier' means something that is more suitable for that period.