insufficient

Emphasizes that something is significantly not enough.

Highlights that the insufficiency is obvious to anyone.

Indicates that the lack is plain and obvious, without need for further explanation.

A more formal way to say completely or entirely not enough.

Expresses that the lack is very bad and regrettable.

Used to state that something is not enough.

Used when something is shown to be not enough after being tested or used.

Used to specify the purpose or person/thing for which something is not enough.