Force, pressure, friction, inertia — the words with which an explanation begins instead of ending.
Practise this list
From these 50 words, as many per round as you like — up to all of them: first what is due today, then new ones. First you choose, then you fill the gap, then you write it yourself. Mistakes come back again shortly.
More about this list
The eleventh entry is l’attrito, and it looks like « attrition ». It is not. Both go back to atterere, to rub against, to wear away — ad plus terere, to rub — but the two descendants ended up in different trades. In English, « attrition » is a wearing down over time and nothing else: a war of attrition, a workforce reduced by attrition as people leave and are not replaced. It is never the quantity in a physics problem. That quantity is « friction », from the other Latin verb for rubbing, fricare. And here the two languages cross, because Italian has that word as well: la frizione is the clutch of a car, the pedal on the left, and also a brisk rub with alcohol. It is not friction. So the set has to be learnt whole and backwards — l’attrito is friction, la frizione is the clutch, and « attrition » belongs in no physics text at all. One consolation: the figurative sense matches exactly. Ci sono attriti nel gruppo is friction in the team, in both languages, rubbing that makes heat between people.
The words
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Verb (4)
annullarsito cancel outVerbB2
Le due forze si annullano esattamente.The two forces cancel out exactly.
deviareto deflectVerbB2
Il campo devia la particella.The field deflects the particle.
propagarsito travel, to spreadVerbB2
Il suono si propaga più veloce nell’acqua.Sound travels faster in water.
decelerareto slow downVerbB2
L’attrito decelera il movimento.Friction slows the movement down.
Phrase (7)
esercitare una forzato exert a forcePhraseB2
La molla esercita una forza verso l’alto.The spring exerts a force upwards.
costante nel motosteady throughoutPhraseB2
La portata è costante nel moto.The flow rate is steady throughout.
proporzionale aproportional toPhraseB2
La forza è proporzionale all’accelerazione.Force is proportional to acceleration.