from time to time i have come across words like perseverance, importance, maintenance etc. and negligence, diligence, oppnent, imminent etc. and would question myself why it should be import"ance" but not import"ence"...
i mean, is there a rule to distinguish when the suffixes will be ant/ance or ent/ence, or it would have to be traced back to the time when words are invented?
if there does exist a rule or sth, i guess there won't be any hassle to learn them by heart, words end with "ance/ant" and "ence/ent" are so easily mixed up..
i know this makes a tough problem but i would appreciate your help, thx