Radhika can be phonetically spelled in several ways depending on the desired level of detail and the target audience's familiarity with phonetic alphabets. Here are a few options:

Option 1 (Simple): Rad-ih-ka

This is a straightforward syllabic breakdown, suitable for basic understanding. It's easily understood by most English speakers.

Option 2 (IPA - International Phonetic Alphabet): /rɑːdɪkɑː/

This uses the International Phonetic Alphabet, providing a precise representation of the pronunciation. This is the most accurate but requires familiarity with the IPA.

Option 3 (More Detailed): Raa-dee-kah

This option adds a bit more nuance to the vowel sounds, particularly the "a" sounds, making it slightly more precise than Option 1.

Option 4 (Considering regional variations):

The pronunciation of "Radhika" can vary slightly depending on the speaker's regional accent (e.g., Indian, American, British). To provide a more tailored phonetic spelling, more information about the desired accent would be needed. For instance, an Indian accent might emphasize the "d" sound more, while an American accent might slightly alter the vowel sounds.

Option 5 (Emphasis on specific sounds):

If a specific sound needs emphasis, this can be indicated. For example, if the emphasis is on the first syllable, it could be represented as 'RAA'-dee-kah.

The best option depends on the context and the audience. For casual communication, Option 1 or 3 might suffice. For academic or linguistic purposes, Option 2 is preferable. For clarity with a specific regional accent, further information is needed.