The default English–Hindi dictionary, with audio, word games and phone apps.
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vocabularyreading
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Bidirectional English–Hindi lookup with pronunciation audio, spelling and transliteration help, word-of-the-day and quizzes, plus Android and iOS apps for offline-ish use. It is the dictionary most learners settle on because coverage of everyday vocabulary is good and it handles both scripts. Entries are terse — you get glosses rather than usage notes or example sentences — so check a corpus or ask a native speaker before trusting a synonym.
Free multilingual dictionary with etymologies, IPA and full conjugation tables.
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vocabularygrammarpronunciation
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Over 100 language editions; the English edition alone has millions of entries covering hundreds of languages, with IPA, declension and conjugation tables, etymologies and usage notes that commercial apps usually paywall. The etymology sections are quietly one of the best vocabulary-retention tools available. Being crowd-sourced, coverage is uneven and rare entries can be wrong — cross-check anything unusual against a native-language dictionary.
Crowd-sourced pronunciations of nearly any word by native speakers.
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pronunciationlistening
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Around 6 million words recorded by native speakers across 400+ languages, usually with several accents per word so you can hear regional variation. Free to search on the site; the paid tiers are aimed at API users and bulk audio downloads. Indispensable for names, place names and anything a TTS voice would mangle — many learners wire it directly into Anki for card audio.