The suffix “se- -nya” as an adverb is used in a limited way in some verbs (verbs) and adjectives (adjectives).
- Dia jatuh sakit sekembalinya dari berlibur di Bali.
- He/She fell ill upon his return from a holiday in Bali.
Sekembalinya means when he/she is back from.
- Jangan bicara seenaknya tanpa mengindahkan perasaan orang lain.
- Don’t speak [your mind] without considering other people‘s feelings.
There’s no direct translation for the word ‘seenaknya’. Seenaknya means whatever that person wants, being inconsiderate.