ineffective
US /ˌɪnɪˈfɛktɪv/
・UK /ˌɪnɪˈfektɪv/
B1
adjecitve
- Not producing the right result; not working well
Examples
These weapons are totally ineffective against tanks.
chemicals that are very ineffective in killing weeds
US /ˌɪnɪˈfɛktɪv/
・UK /ˌɪnɪˈfektɪv/
These weapons are totally ineffective against tanks.
chemicals that are very ineffective in killing weeds