heads-up (adj.)youdaoicibaDictYouDict[heads-up 词源字典]
"clever, alert," 1926, from warning cry "heads up!" (i.e. "look up!"). As a noun, "a notification, a warning," by 1988.[heads-up etymology, heads-up origin, 英语词源]
headsman (n.)youdaoicibaDictYouDict
"executioner," c. 1600, from genitive of head (n.) + man (n.). Used earlier in sense "chief, leader" (c. 1400).
headstone (n.)youdaoicibaDictYouDict
c. 1400, "cornerstone," from head (adj.) + stone (n.). Meaning "upright stone at the head of a grave" is 1775, from head (n.).
headstrong (adj.)youdaoicibaDictYouDict
"determined to have one's way," late 14c., from head (n.) + strong. Compare Old English heafodbald "impudent," literally "head-bold." Strongheaded is attested from c. 1600.