Y10W26VC Theme Words — Environmental collapse

Irreversible describes a change, decision, or process that cannot be undone or returned to its former state.

Word Breakdown: ir- (prefix meaning ‘not’)

Word family: irreversibly (adv.), irreversibility (n.)

Example: Scientists warn that certain ecological tipping points, once crossed, trigger irreversible changes to the climate system.

Synonyms: permanent, unalterable, final

Collocations: irreversible damage, irreversible change, irreversibly lost

A threshold is the point or level at which something begins to take effect, change, or produce a significant consequence — often the point of no return.

Example: The Intergovernmental Panel on Climate Change has warned that allowing global temperatures to exceed the 1.5 degree threshold will trigger cascading and potentially irreversible consequences.

Synonyms: tipping point, boundary, limit

Collocations: exceed a threshold, critical threshold, reach a threshold

A consequence is a result or effect that follows from an action or event, particularly one that is significant or far-reaching.

Word Breakdown: con- (prefix meaning ‘together’ or ‘with’)

Word family: consequential (adj.), consequently (adv.)

Example: The long-term consequences of failing to act on climate change are likely to be disproportionately severe for the world’s most vulnerable communities.

Synonyms: result, effect, outcome

Collocations: unintended consequences, far-reaching consequences, face the consequences

To legitimise means to make something lawful, acceptable, or valid in the eyes of the public or an authority, often by providing justification or official sanction.

Word Breakdown: -ise (suffix meaning ‘to make or render’)

Word family: legitimisation (n.), legitimate (adj.)

Example: Critics argue that economic growth arguments are routinely used to legitimise practices that cause serious environmental harm.

Synonyms: justify, sanction, authorise

Collocations: legitimise a practice, legitimise authority, legitimise the use of

To validate means to officially confirm that something is correct, accurate, or acceptable, or to give recognition that something is worth taking seriously.

Word Breakdown: -ate (suffix meaning ‘to make’)

Word family: validation (n.), valid (adj.)

Example: Peer review processes validate scientific claims by ensuring they have been scrutinised by independent experts before publication.

Synonyms: confirm, endorse, authenticate

Collocations: validate findings, validate concerns, peer-validated

To endorse means to express public support or approval for something, or to officially declare that it meets required standards.

Word Breakdown: en- (prefix meaning ‘in’ or ‘upon’)

Word family: endorsement (n.)

Example: Several leading scientific bodies have endorsed the report’s central recommendation that emissions targets be tightened within five years.

Synonyms: support, back, approve

Collocations: endorse a policy, publicly endorsed, official endorsement

To sanction means to give official permission or approval for something, or as a noun, a penalty imposed for breaking a rule or law.

Word family: sanctioned (adj.)

Example: The use of pesticides that damage pollinator populations is implicitly sanctioned by regulatory frameworks that prioritise agricultural productivity.

Synonyms: authorise, approve, permit

Collocations: sanction the use of, officially sanctioned, economic sanctions

To authorise means to give official permission or approval for something, making it legally or formally valid.

Word family: authorisation (n.), authorised (adj.)

Example: The minister authorised the release of classified environmental data in response to sustained public pressure.

Synonyms: approve, sanction, permit

Collocations: authorise the release of, officially authorised, authorise the use of

The phrase ‘this legitimises’ is used in academic writing to signal that an argument, action, or policy effectively makes something appear acceptable or valid — often something the writer considers problematic.

Example: By framing deforestation as economic development, the government’s language deflects criticism; this legitimises practices that would otherwise face stronger public opposition.

Synonyms: this justifies, this authorises, this makes acceptable

Collocations: this legitimises the claim that, this legitimises the practice of, this effectively legitimises