nuller (adjective) null: ineffectual, valueless
Sinonime: menage a trois, ternary, ternion, third, triad, trichotomy, trilogy, trinity, trio, tripartition, triplet, triplets, triplex, triplicate, triplication, triplicity, triumvirate, trivium, troika
Antonime: effective,
effectual,
valid,
valuable,
worthwhile,
worthy