1) His ill-concealed laughter gave away his true feelings.

2) Despite her words, her ill-concealed smirk revealed her skepticism.

3) The teacher noticed the student's ill-concealed anxiety during the test.

4) The politician's ill-concealed disdain for his opponent was evident in his tone.

5) She tried to hide her ill-concealed disappointment at the news.

6) The detective saw through the suspect's ill-concealed nervousness.

7) Their ill-concealed envy of her success was obvious to everyone.

8) The child's ill-concealed excitement about the upcoming trip was infectious.

9) The actress's ill-concealed frustration with the director was palpable.

10) His ill-concealed anger simmered beneath the surface during the argument.