The Palatalization Environment
Basic palatalization is a common word-structure pattern. A final ㄷ or ㅌ meets a relevant 이-series grammatical or derivational form. The consonant links toward the next syllable and changes quality while the spelling remains unchanged.
Core mapping
Local spelling · Common sound · What to notice
final ㄷ + relevant 이-series form · ㅈ · The linked consonant changes quality.
final ㅌ + relevant 이-series form · ㅊ · The linked consonant changes quality.
The environment is morphological as well as phonetic: do not apply it to every syllable written 이.
Spelling Versus Sound
Read the standard spelling first. The square-bracket forms are listening guides, not replacement spellings.
Verified spelling and sound
Spelling · Sound · Why
같이 · [가치] · Final ㅌ meets the relevant 이 form.
굳이 · [구지] · Final ㄷ meets the relevant 이 form.
밭이 · [바치] · Final ㅌ meets the subject particle 이.
해돋이 · [해도지] · The ㄷ in 돋 meets a derivational 이 form.
붙이다 · [부치다] · Final ㅌ meets the derivational 이 in the written form.
The written words stay 같이 굳이 밭이 해돋이 and 붙이다.
From Words to Sentences
Keep normal spelling in every sentence. Predict locally, then listen for the changed sound in the complete line.
Everyday applications
우리 같이 가요. 같이 is commonly heard as [가치].
밭이 정말 넓어요. 밭이 is commonly heard as [바치].
굳이 새것을 살 필요는 없어요. 굳이 is commonly heard as [구지].
유진은 사진을 붙여요. This related form comes from 붙이다 [부치다] and keeps the ㅊ quality.
우리는 해돋이를 같이 봐요. 해돋이 is commonly heard as [해도지].
Read the spelling first, then let the natural sound change occur without rewriting the word.