Unforceful is a word that indicates something is lacking strength or is weak. There are several synonyms for the word unforceful that you can use in your writing to express this idea more effectively. One synonym for unforceful is feeble, which suggests something is lacking vigor and energy. Another synonym is weak, indicating something is not strong enough to be effective. Other options include insipid, indicating something lacks originality or excitement, and lackluster, meaning something is dull and uninspiring. Additionally, you could use synonyms such as impotent, powerless, limp, or ineffective to better express the idea of something being unforceful.