Working Earnestly
Sincerity, Diligence, Effort
noun, verbal noun
たんせい
誠 （まこと） Sincerity, Truth
誠実 （せいじつ） Sincere, Honest, Faithful
誠意 （せいい） Sincerity, Good Faith
丹誠 （たんせい） Working Earnestly, Sincerity, Diligence, Effort
丹念 （たんねん） Diligent, Careful, Elaborate, Meticulous
A tan たん used to say せい you were Working Earnestly out in the field.