The thesaurus of synonyms and related words is fully integrated into the dictionary. Click on the thesaurus category heading under the button in an entry to see the synonyms and related words for that meaning. Past participles:arisen, been, befallen... This is the British English definition of striven.
Personally, sarcasm can mean a couple of things depending on how it is dealt out. If it is sarcastic in a funny way, that person may have a sense of humor. If it is said in a mean way, than that person is probably insecure and unhappy. IMHO!
distinguishing sarcasm from banter and referring to the use of irony in sarcasm bousfield writes that sarcasm is the use of strategies which on the surface appear to be appropriate to the situation but are meant to be taken as meaning the opposite in terms of face management