underground
adjectiveBelow the surface of the earth.
nounA railway system that runs beneath city streets.
nounThe space and tunnels beneath the ground.
adjectiveHidden or secret.
nounA group of people working against the government in secret.
adverbBelow the ground.
Syllables
3 syllables
Letters
Phonics breakdown
Phonics Rule: Prefix UN-
UN- means 'not' or 'the opposite of'. 'Unhappy' means 'not happy'.
The prefix un- is added to the beginning of a word to mean 'not' or to reverse an action. 'Happy' → 'unhappy' (not happy). 'Do' → 'undo' (reverse doing).
Tip
UN makes it undone — unhappy, unfair, unlike!
Examples
Phonics Rule: Letter D
The letter D makes the /d/ sound, like in 'dog', 'day', and 'dig'. The tongue tip touches behind the upper teeth.
D is a voiced alveolar stop. The tongue tip touches the ridge just behind the upper front teeth, then releases with voice. It reliably makes the /d/ sound in almost all positions.
Tip
D is for dog — and dog starts with /d/!
Examples
Phonics Rule: R-Controlled ER
When R comes after E, it makes the /ɜːr/ sound, like in 'her' and 'fern'.
ER makes the same sound as IR and UR — they all say /ɜːr/. ER is the most common spelling of this sound, especially at the end of words.
Tip
ER, IR, and UR all sound the same — Bossy R wins again!
Examples
Phonics Rule: GR Blend
G and R blend together — you hear both sounds! Like in 'green' and 'grow'.
The blend GR combines /ɡ/ and /r/ spoken quickly together.
Examples
Phonics Rule: OU Diphthong
OU makes the /aʊ/ sound, like in 'out' and 'house'.
The diphthong OU glides from /a/ to /ʊ/. It usually appears in the middle of a word. OU has several possible sounds, but /aʊ/ is the most common.
Tip
OU — ouch! I'm out of the house!
Examples
Phonics Rule: ND End Blend
ND at the end of a syllable blends /n/ and /d/ together, like in 'hand', 'sand', and 'send'.
ND is a common end blend (coda blend). The nasal /n/ and voiced stop /d/ are both heard. It appears very frequently in English words.
Tip
ND ends with a d-d-d — hand, sand, send!
Examples
What is SnapPhonics?
A phonics reference for teachers, parents and learners. Every English word, broken into the sounds that make it — with audio, syllables, and the rule behind each spelling.
Save words to study lists, build flashcard decks, and scan your own worksheets and books.