This is the 5082nd most frequent Japanese word.
言動
Speech and behavior.
"言動" in this sentence is used to encompass someone's speech ("言") and actions ("動"), indicating their overall behavior.
彼の言動は常に紳士的でした。
His words and actions were always gentlemanly.
Here, "言動" refers to specific kinds of speech and actions that are undesirable, highlighting a caution or advice.
そのような言動は避けるべきです。
Such words and actions should be avoided.
In this context, "言動" is used to monitor or consider the behavior (both in speech and deed) of a group for oversight or guidance.