insidious, stealthy, creeping
La désinformation agit de façon insidieuse, en semant le doute plutôt qu'en affirmant.
Disinformation works in an insidious way, sowing doubt rather than asserting.
The spellings this word turns up in. There are 2 of them.
All the level C1 words (100 words)
Memory lets a word go along a curve. Spaced repetition schedules the next flashcard just before the word slips, so every repeat buys more time than the one before it.
Seven cases, no shared vocabulary and a stress mark nobody writes down. What is genuinely hard about Lithuanian for an English speaker, what is easier than advertised, and the order that works.
Verba sends a short dictation every morning and brings the word back exactly when it starts to fade.