I have wondered about how to make the words silly , ugly , friendly , lively , etc. into adverbs, so I researched in the Internet. I found many different answers, so I tried checking Oxford Dictionaries. However, Oxford Dictionaries still gave me two answers: this is from Oxford Dictionaries’ online grammar reference, “ forming adverbs ” page Adjectives that end in -ly, such as friendly or lively, can’t be made into adverbs by adding -ly. You have to use a different form of words, e.g. ‘in a friendly way’ or ‘in a lively way’ instead from the dictionary entries: there are results from typing sillily , uglily , friendlily , livelily into Oxford Dictionaries’ website (online dictionary) That’s quite an obvious contradiction from one of the most famous dictionary providers of the world! So, are the words sillily, uglily, friendlily, livelily , etc. valid English? Note: I already saw the “comparative and superlative adverbs” question that asked about the word sillily but I don't s...