2015年3月10日 · When at loggerheads came about soon thereafter, it may have referred to the use of loggerheads as weapons in fights. In any case, at loggerheads (loggerheads is always plural in the idiom) now implies harsh disagreement but not necessarily violence. (The Grammarist) The Phrase Finder: 'At loggerheads' is of UK origin.

2020年7月15日 · The origin of the phrase 'At loggerheads' .....'At loggerheads' is of UK origin. The singular 'loggerhead' occurs as a name in several contexts - as a species of turtle, a bird and as a place name. Originally, a loggerhead was none of these but was used with the meaning of 'a stupid person - a blockhead'.

2012年5月23日 · The first instance I can find is in an 1833 speech by Samuel P. Carson in the U. S. House of Representatives, cited in Niles' Weekly Register.

2014年3月21日 · Here is an interesting discussion of US versus U.S. versus USA versus U.S.A. from Wikipedia: Manual of Style:. In American and Canadian English, U.S. (with periods) is the dominant abbreviation for United States.

2012年8月22日 · Stack Exchange Network. Stack Exchange network consists of 183 Q&A communities including Stack Overflow, the largest, most trusted online community for developers to learn, share their knowledge, and build their careers.

2016年4月2日 · Stack Exchange Network. Stack Exchange network consists of 183 Q&A communities including Stack Overflow, the largest, most trusted online community for developers to learn, share their knowledge, and build their careers.

2015年2月8日 · Random House Historical Dictionary of American Slang (1997) does not indicate that the originating metaphor is likely a ball bouncing off a wall—that idea appears to be original to the person who posted the 2006 entry you quote above from WordOrigins.org.

Here is a reference. In their The Elements of Style, Strunk and White discourage the use of "etc." at the end of such lists.