How to spell SIYSTEM correctly?

Here are a few possible correct suggestions for the misspelling "siystem". The correct spelling for the word might be "system", which refers to a set of connected parts organizing a whole. Another suggestion could be "sister", which refers to a female sibling. Lastly, "siesta", meaning a short afternoon sleep, could also be a plausible alternative for the misspelling.

• sister
• system The new security system will keep the building safe.
• systems Our company is implementing new systems to improve productivity and efficiency.

Ideling

• addling
• adeline
• dealing
• dialing
• diddling
• doling
• dueling
• fiddling
• idling
• middling