'Apribottiglie', 'cavatappi' and other verb + noun gadgets
Italian names many everyday tools and gadgets by joining a verb to a noun: apri (open) + bottiglie (bottles) gives apribottiglie, a bottle opener. Cava (pull out) + tappi (corks) gives cavatappi, a corkscrew. The same pattern gives you asciugacapelli, portachiavi and caricabatterie. Two things are unusual about these words. They are masculine, even when the noun inside is feminine. They also stay the same in the plural.
English speakers trip over this because the word often ends in -e or -a, which looks feminine or looks like it should change. So learners write la cavatappi or invent plurals like apribottiglii. Once you spot the verb + noun shape, you can stop guessing.
The first part is a verb, usually the form you would use for a command: apri, asciuga, porta, schiaccia. The second part is the thing the tool acts on. Very often that noun is already plural: capelli (hairs), chiavi (keys), noci (nuts), matite (pencils). A hair dryer dries hair, a nutcracker cracks nuts.
Because the noun is already plural, the word has nothing left to change. Only the article and any adjective show that you mean more than one: il cavatappi, i cavatappi. And whatever the gender of the noun inside, the whole word is treated as masculine, because it names an object.
The same happens when the noun is feminine singular, as in parabrezza (brezza, breeze) or posacenere (cenere, ash). The word is still masculine and still stays the same: il posacenere, i posacenere.
apribottiglie, cavatappi, scolapasta, tostapane, schiaccianoci, stuzzicadenti, posacenere, portacandele, scacciamosche. Note lo before words starting with s + consonant: lo scolapasta, gli stuzzicadenti.
asciugacapelli, caricabatterie, aspirapolvere, portachiavi, attaccapanni, portasciugamani, temperamatite, cacciavite. Before a vowel you get l' and gli: l'attaccapanni, gli aspirapolvere.
parabrezza, parasole, paracadute, salvagente, tosaerba, cavalcavia, spaventapasseri, acchiappafarfalle.
The main exception is lavastoviglie (dishwasher), which is feminine: la lavastoviglie. It still stays the same, so the plural is le lavastoviglie. The same goes for lavatrice-style machine names that people think of as feminine, so learn lavastoviglie as a special case.
When the noun inside is masculine singular, check the word. Some change in the plural like normal nouns: il portafoglio, i portafogli; il grattacielo, i grattacieli; il tergicristallo, i tergicristalli; il corrimano, i corrimani. Others, like tostapane and parasole, stay the same. With cacciavite you will hear both i cacciavite and i cacciaviti.
When a tool or gadget name is built from a verb plus a plural noun, like apribottiglie, asciugacapelli or portachiavi, treat it as masculine and never change its ending. Use the article to show the number: il cavatappi, i cavatappi. This also works when the noun is feminine (il parabrezza, i parabrezza). Remember the feminine exception la lavastoviglie, and check words with a masculine singular noun, since some of them change in the plural (portafogli, grattacieli).







