(bound form) ten-day period; one of the three ten-day divisions of a month (e.g. 上旬[shang4 xun2]); (bound form) ten years (in age expressions, e.g. 六旬[liu4 xun2] "sixty years old")

70 years; one's seventies; 70 days

first third of a month

last third of the month

80 years; one's eighties; 80 days