De (Cyrillic letter — Д, д)

Form and typography

The letter descends from the Greek delta and inherited its basic consonantal value. In upright printed type the lowercase д often appears as a two-part shape; in italic type and in handwriting it commonly simplifies to a single-storey form that can resemble a Latin "g" or a cursive loop. Unicode encodes the characters as U+0414 (Д) and U+0434 (д).

Pronunciation and phonology

Phonetically, De represents a voiced stop [d]. In languages such as Russian it contrasts with a palatalized counterpart [dʲ] before front vowels (e.g., день "day"). Standard phonological processes affect it: final devoicing in some contexts, and regressive voicing assimilation that can make /d/ become voiceless before voiceless consonants.

Uses and examples

• Russian: дом (dom) "house" — initial Д = [d]
• Russian: день (denʹ) "day" — palatalized Д = [dʲ]
• Across Slavic and non‑Slavic languages using Cyrillic the letter maps to similar /d/ sounds or adapted values in loan transcription.

Historically its Old Church Slavonic name was добро (dobro), appearing in early Cyrillic alphabets and acrophonic naming systems. Today it remains a core consonant symbol in Cyrillic orthographies, with shape and articulation adapting to typefaces and local phonetic rules.