Weedy
Part of speech: adjective
Definition: Small and weak Characteristic of a plant that grows rapidly and spreads invasively, and which grows opportunistically in cracks of sidewalks and disturbed areas.
Underweight
Part of speech: adjective
Definition: Of an inappropriately or unusually low weight.Not too heavy for an intended purpose.
Part of speech: noun
Definition: The state or quality of being underweight.
Part of speech: verb
Definition: To underestimate the weight of.To give insufficient weight to (a consideration); to underestimate the importance of.