timoroso

: immediately, suddenly. used as a direction in music.

adjective or adverb so·​ste·​nu·​to ˌsō-stə-ˈnü-(ˌ)tō ˌsȯ- : sustained to or beyond the note's full value. used as a direction in music. sostenuto.

tran·​quil·​lo. tränˈkwē(ˌ)lō : in a quiet or calm manner. used as a direction in music.

much, very [Italian, much, very] An expression used to augment the directive to which it is applied. This term is often used to modify tempo markings in a composition. For example, the term allegro molto would mean that the indicated passage would be performed a very fast tempo, faster than allegro.

The Italian musical term subito, which means “quickly; suddenly,” is used alongside other musical commands to make their effects immediate and abrupt. Some common examples of subito commands include: subito fortissimo (sff), “suddenly very loud.”

adv (Music) (preceding or following a dynamic marking, etc.) suddenly; immediately, (Abbrev.)

In music, the term "simile" means "in a similar way." This is an indication for the performer to play a specific section or group of bars similarly to previous passages.

vivace (plural vivaces) (music) A piece to be played at a brisk, lively tempo.

adjective. even [adjective] (of temperament) calm. peaceful [adjective] quiet; calm; without worry or disturbance.

¡Tranquilo, (Teo)! ¡Tranquila, (Magda)! Calm down, relax, don't worry, (Teo, Magda)!

a very long time long donkey's years/ages [noun plural] a very long time. long [adverb] a great period of time. (Translation of molto tempo from the PASSWORD Italian–English Dictionary © 2014 K Dictionaries Ltd)

The word 'molto' means 'very', 'a lot', 'very much', ' a great deal' and so on.