septuagenarian

n, adj [attrib 作定语] (fml 文) (person) between the ages of 70 and 79 70 到 79 岁的（人）.

separably, separate, separate from, separate...from, separated, separately, separateness, separation, separatism, separatist, separator, sepia, sepsis, Sept, sept(i)-, September, septet, septic, septic tank, septicaemia (US septicemia), sepulchral, sepulchre (US sepulcher), sequel, sequela, sequence, sequence of tenses, sequential, sequentially, sequester, sequestered, sequestrate, sequestration, sequin, sequoia, seraglio, seraph, seraphic, sere, serenade, serendipity,