Word part · Anglo-Saxon prefix
Prefix under- words: meaning and 16 examples
In short
The Anglo-Saxon prefix under- (from Old English) means "below, or too little". Words with it include underground, underwater, underline, underpass, undersea and undershirt. Under- is the opposite of over- in both jobs: below (underground) and too little (undercooked).
- Part
- under-
- Meaning
- below, or too little
- Origin
- Anglo-Saxon
- Words listed
- 16
Under- is the opposite of over- in both jobs: below (underground) and too little (undercooked).
Words with the Anglo-Saxon prefix under-
The list runs from shorter, common words to longer ones. The bands are a rough guide built from syllable count and how common each word is in our word list, not a grade-level standard. Read each word, then its word sum.
Colors:prefixroot or basesuffix
Next: longer words (about grades 5 and 6)
| Word | Word sum | What it means |
|---|---|---|
| underground | under (prefix)+ground (root or base)→underground | below the ground |
| underline | under (prefix)+line (root or base)→underline | draw a line below words |
| underpass | under (prefix)+pass (root or base)→underpass | a road that goes below another road |
| undersea | under (prefix)+sea (root or base)→undersea | below the sea |
| undershirt | under (prefix)+shirt (root or base)→undershirt | a shirt worn below another shirt |
| underweight | under (prefix)+weight (root or base)→underweight | weighing too little |
| underfed | under (prefix)+fed (root or base)→underfed | not given enough food |
| underpaid | under (prefix)+paid (root or base)→underpaid | paid too little |
More words: underneath, undergrowth, underdog
Stretch: long or less common words (about grades 7 and 8)
| Word | Word sum | What it means |
|---|---|---|
| underwater | under (prefix)+water (root or base)→underwater | below the water |
| undercooked | under (prefix)+cook (root or base)+ed (suffix)→undercooked | not cooked long enough |
| underestimate | under (prefix)+estimate (root or base)→underestimate | guess too low |
| undercover | under (prefix)+cover (root or base)→undercover | working in secret, hidden |
More words: undercurrent
How do you teach the prefix under-?
Teach under- right after over-, since the meanings mirror each other. Underground and underwater are about place: below. Undercooked and underpaid are about amount: too little. Students handle the place meaning easily. The amount meaning needs examples, so pair each word with its over partner: overcooked and undercooked, overweight and underweight. The contrast makes both stick.
A quick routine
Put pairs on cards: overcooked and undercooked, overpass and underpass, overweight and underweight. Say, "Over can mean too much or above. Under is the opposite." The student reads each pair and explains the difference in one sentence: "An overpass goes above the road and an underpass goes below it." Finish with underestimate, a word that comes up in math.
What do students mix up with under-?
Under hides in words like thunder, wonder and blunder, where it is part of the base. Taking under off leaves nothing. Understand is the tricky one: it looks like under plus stand, and it was built that way long ago, but standing below no longer explains the meaning. Leave it out of an under- lesson.
For the sounds inside these words, see the phonics word lists. Routines that fit: meanings of prefixes and suffixes, circle the parts, read the base and flexible routine for big words.
Questions people ask
What does the prefix under- mean?
Under- means "below, or too little". It is a Anglo-Saxon prefix. Under- is the opposite of over- in both jobs: below (underground) and too little (undercooked).
What are some words with the prefix under-?
Start with underground, underline, underpass and undersea. Then move to underwater and undercooked. This page lists 16 words in all, most with a word sum that shows the parts.
Is understand built with the prefix under-?
It was, centuries ago, but the meaning has drifted so far that the parts no longer help. Teach it as a whole word and use underground and underline to teach the prefix.
Related word parts
- over-too much, or above
- sub-under, or below
- mid-middle
- out-outside, or better than
- fore-before, or at the front
Terms on this page: morpheme, root, prefix, suffix, base word, word sum, morphology.
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