is not enough, is lacking
重量が足りてない
It doesn't weigh enough.
— ダンガル きっと、つよくなる (2016)
愛情が足りてないようね
It seems you're not getting enough love.
— Carandiru (2003)
ダメージが足りてない！
You're not dealing enough damage!
— Godzilla Minus One (2023)
半分にも足りてない
It doesn't even amount to half.
— ブゴニア (2025)