erratico
erratic, irregular
adjective er-RAH-tee-koh Rare
Origin: from Latin erraticus (wandering), from errare (to wander)
Also means
wandering
Usage Note
Erratico describes something that follows no predictable pattern — erratic behaviour, an erratic pulse, or, in geology, an erratic boulder (masso erratico) transported by a glacier far from its origin. It is a false cognate trap only in the geological sense; in everyday Italian it simply means 'inconsistent' or 'unpredictable'. Plural: erratici (m), erratiche (f).
Examples
"Il suo comportamento è del tutto erratico."
Natural Translation
His behaviour is completely erratic.

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