noun, na-adjective, noun which may take the genitive case particle 'no'
lacking dignity; not commanding enough respect; insufficient gravitas
Used when someone does not have the presence, authority, or weight expected for their role or position. Often implies the person seems too lightweight or unimpressive for the job.
He lacks the gravitas to be a department head.
That actor doesn't have enough presence and isn't suited for the role of a company president.
Compound of 貫禄 (dignity, presence) and 不足 (insufficiency).