Îl reziliem fără ca abonatul să plătească.

Because Romanian often leaves subject pronouns out when the verb already shows the person clearly.
Here, reziliem ends in -em, which tells you it is 1st person plural: we terminate / we cancel.

You could say Noi îl reziliem, but that would usually add emphasis, like we are the ones terminating it.

Îl is an unstressed direct object pronoun meaning it / him. In this sentence, it means it and refers to some masculine or neuter singular noun already understood from context, such as contractul or abonamentul.

Romanian normally puts this kind of short object pronoun before the conjugated verb, so you get îl reziliem = we terminate it.

Reziliem is the 1st person plural present indicative of a rezilia.

So grammatically it means we terminate / we rescind / we cancel.
This verb is quite formal and is especially common in legal, contractual, or administrative language. It is not the most casual everyday verb for cancel.

Because Romanian often uses fără ca + subject + să + verb when the action after without has a different subject from the main clause.

In this sentence:

• main clause subject: understood noi = we
• subordinate clause subject: abonatul = the subscriber

So Romanian uses:

fără ca abonatul să plătească

This is the standard way to say without the subscriber paying.

Because after fără ca, Romanian uses the subjunctive, and the subjunctive is normally marked by să.

So:

• plătește = he/she pays or is paying in the indicative
• să plătească = that he/she pay / to pay in the subjunctive structure used here

After fără ca, plătește would be ungrammatical.

Because abonatul is the subject of the subordinate clause: abonatul să plătească = the subscriber pay.

That means it must be in the nominative form, which here is abonatul.

By contrast, abonatului is usually dative/genitive, meaning something like:

• to the subscriber
• of the subscriber

So it would not fit as the subject of să plătească.

The ending -ul is the Romanian definite article, attached to the noun. So:

• abonat = a subscriber
• abonatul = the subscriber

Romanian usually puts the definite article at the end of the noun instead of using a separate word like English the.

In legal or contractual language, this is very common because the sentence is usually talking about a specific party: the subscriber.

That is not the normal or best way to say it.

Fără să + verb is most natural when the subject is the same as the main clause subject or when the subject is left generic. But here the sentence needs to make it clear that the subscriber, not we, is the one who does not pay.

So fără ca abonatul să plătească is the clearer and more standard structure.

Yes. It sounds fairly formal, administrative, or contractual.

Two things make it sound that way:

• a rezilia is a formal verb used for contracts, agreements, subscriptions, and legal arrangements
• abonatul is the kind of noun you often see in service terms and conditions

In everyday speech, people might choose a less formal wording depending on context.

Yes, Romanian word order is somewhat flexible. For example, you could also say:

Fără ca abonatul să plătească, îl reziliem.

That puts more focus on the without paying part first.

But the original order is very natural and neutral. Also, the short pronoun îl normally still stays right before the verb: îl reziliem.