The phrase "a lack of assertiveness" is correct and usable in written English.
It can be used to describe a situation where someone is not confident or forceful in expressing their opinions or needs.
Example: "Her struggles in the workplace can be attributed to a lack of assertiveness, making it difficult for her to voice her ideas during meetings."
Alternatives: "a deficiency in assertiveness" or "a shortfall of assertiveness".
It shows you what we're dealing with -- a lack of assertiveness.
Miers's reticence is not to be mistaken for a lack of assertiveness or ambition.
He would occasionally chip in, but it was evident that there was a lack of assertiveness and self-confidence.
A lack of assertiveness in negotiations is often cited as a potential reason why women might make less money than men for similar work.
The authors suggested that it might actually be "how" women ask, that a lack of assertiveness in negotiations is often cited as a potential reason why women might make less money than men for similar work.
Owing to a lack of assertiveness by the central government, Russia's administrative divisions oblasti (regions), minority republics, okruga (autonomous districts), kraya (territories), federal cities (Moscow and St .Petersburg), and the one autonomous oblast exerted considerable power in the initial years after the passage of the 1993 constitution.
In fact, Sandberg's message is subtly different – we hold ourselves back because of a raft of factors: social expectation, a lack of domestic assertiveness, a sense that, from the minute we reach maturity, we are forward-planning for our own subservience.
In fact, Sandberg's message is subtly different – we hold ourselves back because of a raft of factors: social expectation, a lack of domestic assertiveness, a sense that, from the minute we reach maturity, we are forward-planning for our own subservience.
McKennitt's sparkling soprano voice was as lovely and strong as you could wish, but she was severely limited by a lack of fire, assertiveness and clear-eyed vision in her music.
Moreover, Howard's career-low 4.4 free-throw attempts -- a stunning number for what we'd expect to be a physical presence in the paint -- show a general lack of assertiveness in the half-court.
Especially, they exhibited a lack of responsibility and assertiveness.
