Learn to spell words with prefixes: bi-, tri-, uni-

Free printable Grade 9 English worksheet for "Learn to spell words with prefixes: bi-, tri-, uni-" — practice spelling (grammar and mechanics). No-prep, print or assign online.

This worksheet focuses on spelling words that begin with the prefixes bi-, tri-, and uni-, helping students recognize and understand these common English prefixes. Teachers can use this resource to reinforce prefix knowledge, improve students' spelling skills, and expand vocabulary through targeted practice. Ideal for high school grammar and mechanics lessons, this printable supports differentiated instruction in spelling and word analysis.

English & Reading

Phonics & Phonological Awareness

High School

Worksheets

Ages 14–18

hard

Learning objectives

Identify and spell words correctly using the prefixes bi-, tri-, and uni-
Analyze the meaning of words by breaking them down into prefixes and root words
Apply knowledge of prefixes to enhance vocabulary and improve spelling accuracy

How to use this worksheet

Click “Download Worksheet” to get the PDF — free with a KiwiBee account (up to 25 downloads a month).
Print at home or in class for High School; it's no-prep, with no extra materials needed.
Hand it out as classwork, homework, or a quick warm-up.

Frequently asked questions

Is the “Learn to spell words with prefixes: bi-, tri-, uni-” worksheet free?

Yes. “Learn to spell words with prefixes: bi-, tri-, uni-” is a free printable English & Reading worksheet. Sign in with a free KiwiBee account to download the PDF — it includes up to 25 downloads a month.