not properly based or able to be upheld by reasoning
not usable; not legally recognized
person weakened through illness or injury; one who suffers from ill health for a very long time
"an invalid driver's license"
"the license is invalid"
"He was disabled in a car accident"
He declared the wills technically invalid because of some legal flaw.
出自： R. Graves
His invalid son, who had just suffered his first attack of epilepsy.
出自： J. Barnes
Wounded in the lung and..invalided out of the army with TB.
出自： M. Scammell