Constantia et industria multa mala superant.

They are both nominative singular, which is the case normally used for the subject of the sentence.

• constantia = steadfastness / perseverance / constancy
• industria = diligence / industry

Even though there are two subject words, each one is individually singular. Together they form a compound subject: constantia et industria.

Here -a is the normal nominative singular ending of many first-declension nouns.

So:

• constantia = singular
• industria = singular

A native English speaker often learns early that Latin -a can sometimes be plural, but that depends on the declension and the word’s form. In this sentence, these are first-declension nouns, so -a is singular, not plural.

Because the sentence has a compound subject: constantia et industria = steadfastness and diligence.

Two singular nouns joined by et normally take a plural verb in Latin, just as in English:

• constantia superat = steadfastness overcomes
• industria superat = diligence overcomes
• constantia et industria superant = steadfastness and diligence overcome

So superant is plural to match the two subjects together.

superant is:

• 3rd person plural
• present tense
• active voice
• indicative mood

It comes from the verb supero, superare, superavi, superatum, meaning to overcome, surpass, or defeat.

So superant means they overcome.

They are accusative plural neuter, the direct object of superant.

So the structure is:

• constantia et industria = subject
• superant = verb
• multa mala = direct object

In other words, steadfastness and diligence are doing the action, and many evils / many troubles / many bad things are what they overcome.

Because mala here is neuter plural, not feminine plural.

The adjective multus, multa, multum must agree with the noun it describes in:

• gender
• number
• case

Here the noun is mala, which is neuter plural, so the adjective also becomes neuter plural:

• multa mala = many bad things / many evils

If it were feminine plural, you would expect multae malae, but that is not what we have here.

It is best understood as the neuter plural of malum, meaning evil, misfortune, trouble, or bad thing.

So mala is functioning as a noun: evils or bad things.

At the same time, learners often notice the connection with the adjective malus, mala, malum (bad). That is not accidental: the noun malum literally means something bad, and in the plural mala often means evils, troubles, or misfortunes.

They match in form and function:

• multa = accusative plural neuter
• mala = accusative plural neuter

In Latin, adjectives usually agree with the nouns they modify. So multa describes mala:

• multa mala = many evils / many bad things

This agreement helps you see which words belong together, even if the word order changes.

Latin word order is much more flexible than English word order because Latin uses endings to show grammatical function.

English depends heavily on position:

• Steadfastness and diligence overcome many evils

Latin can show the same relationships through endings:

• constantia et industria are nominative subjects
• multa mala are accusative objects
• superant is the verb

So Latin can place words in different orders without creating confusion. This sentence is actually quite natural and clear: subject first, object next, verb last.

Et means and, and here it joins the two subjects:

• constantia
• industria

So the phrase constantia et industria means steadfastness and diligence.

Because et links two nouns of equal status, the verb becomes plural: superant.

Not with this exact subject.

• superat = he/she/it overcomes
• superant = they overcome

Since constantia et industria are two things joined together, Latin treats them as plural, so superant is the correct form.

If the subject were only one noun, then singular would be right:

• Constantia multa mala superat.
• Industria multa mala superat.

They are abstract nouns. They name qualities rather than concrete objects.

• constantia = constancy, steadfastness, perseverance
• industria = diligence, industriousness, effort

Latin often uses abstract nouns this way, much like English does in statements such as:

• Patience wins
• Hard work overcomes obstacles

So the sentence expresses a general truth.

No. Both nouns are full subjects.

That is, the meaning is not:

• steadfast diligence overcomes...

Instead it is:

• steadfastness and diligence overcome...

Each noun contributes equally, and together they form the compound subject of superant.

Yes. Even though all three words end in -a, they are not the same form.

• constantia = nominative singular, first declension
• industria = nominative singular, first declension
• mala = accusative plural neuter

This is a very common Latin issue: the same spelling ending can represent different grammatical forms depending on the word’s declension and gender. So you should not identify case or number from the ending alone without considering the word and its role in the sentence.