根こん気き仕し事ごと

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Meanings

1

noun

laborious task; work requiring patience

Describes a task that demands steady effort and perseverance over time, often tedious or monotonous.

根こん気き
根気 is the abstract quality of patience or perseverance, while 根気仕事 refers to a specific task that requires that quality.
忍にん耐たい
忍耐 is a more formal term for endurance or forbearance, often used in serious contexts; 根気仕事 is a more everyday term for tedious work.

Compound of 根気 (perseverance) and 仕事 (work). The exact historical derivation is uncertain, but the meaning is transparent from its components.