3, 8. Cancel, delete, erase, obliterate indicate that something is no longer to be considered usable or in force. To cancel is to cross something out by stamping a mark over it, drawing lines through it, or the like: to cancel a stamp, a word. To delete is to cross something out from written matter or from matter to be printed, often in accordance with a printer's or proofreader's symbol indicating the material is to be omitted: to delete part of a line. To erase is to remove by scraping or rubbing: to erase a capital letter. To obliterate is to blot out entirely, so as to remove all sign or trace of: to obliterate a record.

Did you mean morosely?