Use 'indefinable' to describe a trait that makes someone or something special, but is hard to pinpoint. His music has an indefinable quality that sets it apart.
Pro Tip 2/3
Subtle Nuance
'Indefinable' is perfect for nuanced situations where feelings or attributes are not black and white. The painting evoked an indefinable sense of nostalgia.
Pro Tip 3/3
Avoid Overuse
Use 'indefinable' sparingly to maintain its impact and avoid sounding vague or indecisive. The poet's voice had an indefinable sadness, unlike any other.