-able+or+-ible?

Some adjectives end in the letters ‘-able’ or ‘ible’. They mostly refer to the ability or necessity to do something e.g. ‘washable’ (you can wash it), ‘visible (you can see it), ‘emailable’ (you can email it), and the pronunciation is the same. So how on earth do you know which spelling to use? Hint 1: It is much more common for words to end in ‘able’ than ‘ible’. So if you don’t know and there’s no dictionary around, use ‘able’ – you’ve got about a 5:1 chance of being right! Hint 2: Generally we use ‘-able’ when a complete word remains (or just without a final silent ‘e’, or a ‘y’ changed to ‘i’) when we take the suffix away. Of course (being English!) this isn’t always true but it’s a good guide. If that doesn’t help, try this: Hint 3: Play around with the root word and see if you can make any words with ‘-ation’ with it. If you can make an ‘-ation’ word then it’s probably ‘-able’. But if you play around with it and can only make an ‘-ition’ ‘-tion’, ‘-sion’, ‘cian’ or ‘-ion’ word it’s much more likely to be ‘-ible’. Hint 4: If the root comes from a Latin verb ending in ‘are’, use ‘able’. If it comes from an ‘ire’ or ‘ere’ word use ‘ible’. Hint 5: New words are often made with ‘-able’, but not ‘-ible’: ‘emailable’ (I may have made the last two up but they are allowable!) Does this work? can you find some words that match the Hints?