in·suf·fi·cient 
/ˌɪnsəˈfɪʃənt/ adjective
/ˌɪnsəˈfɪʃənt/ adjective [more insufficient; most insufficient] somewhat formal : not having or providing enough of what is needed : not sufficient
▪ The case was thrown out because of insufficient evidence. — often followed by to + verb ▪ There was insufficient evidence to prove their case. — often + for ▪ His income was insufficient for the family's needs.
▪ The case was thrown out because of insufficient evidence. — often followed by to + verb ▪ There was insufficient evidence to prove their case. — often + for ▪ His income was insufficient for the family's needs.
— in·suf·fi·cien·cy /ˌɪnsəˈfɪʃənsi/ noun, plural in·suf·fi·cien·cies [count, noncount]
▪ an insufficiency [=deficiency] of evidence
/ˌɪnsəˈfɪʃənsi/ noun, plural in·suf·fi·cien·cies [count, noncount] ▪ an insufficiency [=deficiency] of evidence
— in·suf·fi·cient·ly adverb
▪ insufficiently strong evidence
▪ insufficiently strong evidence
