Lo siento de verdad.

Because lo siento is a fixed Spanish expression for apologising.

• siento comes from sentir and literally means I feel
• lo means something like it/that

So the structure is closer to I feel it than to a direct word-for-word version of I’m sorry. In modern Spanish, learners should treat lo siento as the normal set phrase for sorry.

Here lo is a direct object pronoun, and it refers in a very general way to what happened, the situation, or the thing you’re apologising for.

You usually do not need to name exactly what lo refers to. In Lo siento, it is part of the standard expression.

So even if there is no clear noun before it, lo still sounds completely natural.

Siento is the first person singular present indicative form of sentir.

That means:

• yo siento = I feel
• infinitive: sentir

This verb is also a stem-changing verb:

• sentir
• siento
• sientes
• siente

So siento is irregular compared with what a learner might expect.

Spanish often uses the present tense in fixed expressions where English uses something less literal.

With Lo siento, the idea is roughly I feel it or I feel sorry about it. Even though English does not phrase apologies that way, Spanish does.

So the present tense here is completely normal and idiomatic.

De verdad adds emphasis and sincerity. It makes the apology sound more heartfelt.

Compare:

• Lo siento = Sorry
• Lo siento de verdad = I’m really sorry / I truly mean it

It suggests the speaker is not just saying the words automatically, but is being genuine.

Not exactly.

De verdad does not literally mean very. It means more like:

• really
• truly
• genuinely

So Lo siento de verdad is not the same structure as very sorry, even if the overall meaning can be similar in English.

If you want a closer match to very sorry, Spanish often uses mucho:

• Lo siento mucho

Yes, absolutely. Lo siento by itself is already complete and very common.

Adding de verdad just gives extra sincerity or emphasis.

So:

• Lo siento = normal apology
• Lo siento de verdad = stronger, more heartfelt apology

They are similar, but not identical.

• Lo siento mucho emphasises degree: I’m very sorry
• Lo siento de verdad emphasises sincerity: I’m truly sorry

Sometimes both ideas can be combined, for example:

• Lo siento mucho, de verdad

That sounds like I’m very sorry, really.

Yes. In Spain, Lo siento de verdad sounds natural and sincere.

It is especially suitable when:

• you want to sound heartfelt
• the situation is a bit serious
• you want to make clear that you really mean your apology

For smaller things, people in Spain might also use:

• Perdón
• Perdona
• Disculpa

Those can sound more suitable for minor interruptions or everyday social situations.

A useful rule is:

• Lo siento = regret, sympathy, more emotional apology
• Perdón / Perdona = excuse me, pardon, small social apology

For example, in Spain:

• if you bump into someone lightly: Perdón
• if you interrupt someone: Perdona
• if something bad happened and you feel sorry: Lo siento
• if you want to sound especially sincere: Lo siento de verdad

So Lo siento de verdad usually feels stronger and more personal than Perdón.

Usually you keep it as Lo siento de verdad.

That is the most natural order for this exact phrase. Spanish can move things around in some contexts, but for a learner, it is best to use the standard order.

You may also hear slight variations such as:

• De verdad, lo siento
• Lo siento, de verdad

These are also natural, but they often reflect spoken emphasis or pause patterns.

A simple learner-friendly pronunciation is:

lo SYEN-to de ber-DAD

A few useful points:

• siento has two syllables after the s sound: SYEN-to
• verdad is stressed on the last syllable: ver-DAD
• in Spain, the d in de and inside verdad is often softer than an English d

You do not need perfect phonetics at first; the main thing is to stress -dad in verdad correctly.