Y06W29VC Word Roots — -terr- (earth / land)

The root -terr- comes from Latin and means 'earth' or 'land'. It appears in words that relate to land, territory, soil and the physical environment. Understanding -terr- helps students decode unfamiliar words in geography, history, science and formal writing. This module explores six key academic words built with this root alongside three Word Families examples.

Word Families

These three words all contain -terr-. As you read, notice how the meaning 'earth / land' helps you work out each word.

territory

/ˈterɪtəri/

ter‑ri‑to‑ry

noun

An area of land under the control of a particular authority, animal or group.

Word Breakdown: -terr- (root meaning 'earth / land')

Example: Many animal species will defend their territory aggressively when other animals attempt to enter.

Synonyms: area, region, domain

Collocations: claim territory, defend territory, uncharted territory

terrain

/təˈreɪn/

ter‑rain

noun

A stretch of land with particular physical features, such as mountains, valleys or plains.

Example: The expedition team trained extensively before crossing the rugged terrain of the mountain range.

Synonyms: landscape, ground, land

Collocations: rough terrain, mountainous terrain, navigate the terrain

territorial

/ˌterɪˈtɔːriəl/

ter‑ri‑to‑ri‑al

adjective

Relating to territory; also used to describe behaviour in which an animal or group defends its area.

Example: Magpies are known for their territorial behaviour during nesting season, often swooping at passers-by.

Synonyms: defensive, possessive, protective

Collocations: territorial behaviour, territorial dispute, a territorial animal

Academic Vocab

maintain

/meɪnˈteɪn/

main‑tain

verb | [maintain – maintained – maintained]

To keep something in its current state; to continue to have or do something.

Word family: maintain (v.), maintenance (n.)

Example: It takes consistent effort to maintain a high standard of writing throughout a lengthy argument.

Synonyms: keep, uphold, sustain

Collocations: maintain a standard, maintain focus, maintain balance

sustain

/səˈsteɪn/

sus‑tain

verb | [sustain – sustained – sustained]

To keep something going over a long period; to support or maintain something through time.

Word family: sustain (v.), sustainable (adj.), sustainability (n.)

Example: The community worked together to sustain the local wetland habitat through a decade of restoration efforts.

Synonyms: maintain, support, preserve

Collocations: sustain growth, sustain effort, sustain a community

preserve

/prɪˈzɜːv/

pre‑serve

verb | [preserve – preserved – preserved]

To protect something from harm, loss or change so that it continues to exist.

Word family: preserve (v.), preservation (n.)

Example: Conservationists work to preserve endangered habitats from urban development and pollution.

Synonyms: protect, conserve, maintain

Collocations: preserve the environment, preserve for future generations, preserve a record

protect

/prəˈtekt/

pro‑tect

verb | [protect – protected – protected]

To keep something or someone safe from harm or damage.

Word family: protect (v.), protection (n.), protective (adj.)

Example: Marine parks are established to protect coral reefs and the species that depend on them.

Synonyms: defend, safeguard, shield

Collocations: protect from harm, protect the environment, protect a species

continue

/kənˈtɪnjuː/

con‑tin‑ue

verb | [continue – continued – continued]

To keep doing something without stopping; to resume after a pause.

Word family: continue (v.), continuous (adj.), continuity (n.)

Example: Scientists continue to monitor sea temperature data in order to track the impact of climate change.

Synonyms: persist, carry on, proceed

Collocations: continue to, continue with, continue despite

in order to

/ɪn ˈɔːdə tuː/

in or‑der to

phrase

‘In order to’ introduces the purpose or goal of an action.

Example: The council planted more trees in order to cool the playground in summer.

Synonyms: so as to, so that, with the aim of

Collocations: in order to improve; in order to understand; in order to protect

Confusing Words

which vs that

Which and that are both relative pronouns, but they are used in different types of clauses. Which introduces a non-defining (or non-restrictive) clause — one that adds extra information but is not essential — for example, 'The report, which she submitted yesterday, was outstanding.' Note that non-defining clauses using 'which' are enclosed by commas.

  • which — Which' usually adds extra information or chooses from a known group — for example, 'The library, which is near the hall, closes at four.'
  • that — That introduces a defining (or restrictive) clause — one that is essential to the meaning of the sentence — for example, 'The report that she submitted yesterday was outstanding.'

Memory rule: A simple test: if you can remove the clause without losing the essential meaning, use which (and add commas). If removing the clause changes what is being referred to, use that (no commas). In formal Australian English, maintaining this distinction is considered good style.