Taivo A Taiwan Mandarin dictionary

天干

tiāngān

ㄊㄧㄢ ㄍㄢ

  1. 1the 10 heavenly stems 甲[jia3], 乙[yi3], 丙[bing3], 丁[ding1], 戊[wu4], 己[ji3], 庚[geng1], 辛[xin1], 壬[ren2], 癸[gui3], used cyclically in the calendar and as ordinal numbers I, II etc

Keep 天干 and it comes back until you know it.

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