A clumsy person.
Awkward, lacking coordination, not graceful, not dextrous.
Not elegant or well-planned, lacking tact or subtlety.
Awkward or inefficient in use or construction, difficult to handle or manage especially because of shape.
Resistant to deformation or flow.
Having sufficient skill, knowledge, ability, or qualifications.
Having jurisdiction or authority over a particular issue or question.
Adequate for the purpose.
Permeable to foreign DNA.