他看起来比去年壮实多了。

He looks much ___stouter than he did last year.

面对困难，他表现出更加坚定的态度。

He showed a ___stouter attitude when facing the challenges.

这把椅子的设计更加稳固，适合长时间使用。

This ___stouter chair design is more suitable for long-term use.