Robust; having strong health or constitution—physically sturdy and hardy.
彼は毎日運動しているのでとても強健だ。
He exercises every day, so he is very robust.
高齢でも強健な人は病気にかかりにくいことが多い。
Even among the elderly, those who are robust tend to be less prone to illnesses.
強健さを保つためにバランスのよい食事が大切だ。
A balanced diet is important to maintain robustness.