This is the 356th most frequent Chinese word.
余
"余" means "surplus," "remainder," or "I/me" (archaic) in Chinese.
余 is used to represent 'left' or 'remaining time' in this context.
我还有时间余下,可以帮你完成任务。
I still have extra time left and can help you finish the task.
余 is used to signify 'more than enough' or 'ample' here.
他的房间宽敞,连走动也显得绰绰有余。
His room is spacious, and even moving around feels more than sufficient.
余 is employed here as a suffix to indicate 'over' or 'more than' a number, in this case, indicating 'over a hundred'.