You can use untold to emphasize how bad or unpleasant something is. [ADJ n] [emphasis]
The demise of the industry has caused untold misery to thousands of hard-working tradesmen…
该行业的没落给数以千计辛苦经营的商贩带来了难言的苦楚。
This might do untold damage to her health.
这也许会给她的健康带来难以估量的伤害。