Is it "gaslighted" or "gaslit"? | The Economist

Key Concepts

• Linguistic Variation: Differences in language usage based on geography (dialects) and time (diachronic change).
• Regularization: The historical tendency for irregular verbs to evolve into regular forms (e.g., -ed endings).
• Semantic Differentiation: When two past tense forms of the same verb carry distinct meanings (e.g., hung vs. hanged).
• Verbalization (Denominalization): The process of creating a verb from a noun (e.g., Google from the brand name, gaslight from the play title).
• Morphological Rule: The linguistic principle that verbs derived from nouns typically follow regular conjugation patterns.

---

The Evolution of Past Tense Forms

Language is dynamic, influenced by both geography and the passage of time. While regional differences account for variations like spelt (British English) versus spelled (American English), historical shifts often drive verbs toward regularization. A notable historical example is the verb help, which previously used the irregular past tense hope and the past participle hulen.

Semantic Differentiation in Irregular Verbs

Some verbs maintain two distinct past tense forms to convey different meanings, preventing ambiguity. A primary example is the verb hang:

• Hung: Used when referring to objects, such as a painting.
• Hanged: Used specifically in the context of an execution.

The Case of "Gaslighted" vs. "Gas Lit"

The confusion between gaslighted and gas lit stems from a misunderstanding of the word's etymology.

• The "Gas Lit" Misconception: Proponents of gas lit often incorrectly assume the word is a compound of the verb to light. Under this logic, gas light would conjugate to gas lit in the same way light conjugates to lit.
• The "Gaslighted" Accuracy: The term gaslight is not derived from the verb to light; it originates from the title of the 1938 thriller play Gaslight. Because the verb is formed from a noun (the play's title), it must follow the standard morphological rule for denominalized verbs.

The Rule of Denominalization

A consistent rule in English grammar is that verbs formed from nouns (or proper nouns) take a regular past tense ending in -ed.

• Example: The verb to Google (derived from the brand name) becomes Googled, not goggled.
• Application: Similarly, the verb to greenlight (derived from the noun phrase "a green light") becomes greenlighted.
• Conclusion: Following this rule, the correct past tense of the verb derived from the play Gaslight is gaslighted.

---

Synthesis

The choice between gaslighted and gas lit is not merely a matter of stylistic preference but one of etymological accuracy. Because gaslight functions as a verb derived from a noun—specifically the 1938 play—it must adhere to the regular conjugation pattern of adding -ed. Recognizing the origin of a word is essential for determining its correct grammatical form, as verbs derived from nouns consistently reject irregular patterns in favor of the regular -ed suffix.