Morphemes in “biweekly”
“biweekly” has 3 morphemes: bi- + week + -ly.
bi
prefix
+
week
root
+
ly
suffix
Spelling changes when the parts join: the boxes show the letters as written; the morphemes themselves are bi- + week + -ly.
Each morpheme explained
| Morpheme | Type | Free / bound | Meaning |
|---|---|---|---|
| bi- | derivational prefix | bound | two, twice |
| week | free root | free | any period of seven consecutive days |
| -ly | derivational suffix | bound | in the manner of; every (as in daily) |
How the word is built
week → weekly → biweekly
Each step adds one affix to the word before it; the root “week” is where the chain starts.
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Prefixes, roots and suffixes with glosses, free and in your browser.
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Segmentation derived from MorphyNet (Batsuren, Bella & Giunchiglia, 2021; CC BY-SA 3.0, built from Wiktionary), with hand-written affix glosses and root meanings from WordNet. Reviewed for classroom use; tell us if you spot an error.
Frequently Asked Questions
How many morphemes are in "biweekly"?
"biweekly" has three morphemes: bi- + week + -ly.
How do you break "biweekly" into morphemes?
bi- + week + -ly. The root is "week"; bi- is a derivational prefix, -ly is a derivational suffix.
What is the root word of "biweekly"?
The root of "biweekly" is "week", built up as week → weekly → biweekly.
Is this morphology tool free?
Yes. The Fixie morphological analyzer is free with no signup and runs in your browser.