These are all great adjectives. In order to use them, you need to know what they mean first. If you already know that, come up with one or two items that you could use these adjectives for the description. Stealthy is in secret and irresolute is uncertain, so you could write something like, "His stealthy personality left her feeling irresolute toward their situation." Maybe work around that sentence?
True. Chaplin may have been the one filmmaker to hold out the longest against sound, but he also happened to be one of the earliest filmmakers to embrace it.
1. Think of two examples: Maybe you think that developing countries does not have as much art - which does contribute to the happiness of the people. Second, maybe the living conditions.