bastable

Bastable means: The Bastables, characters in the 1899 novel The Story of the Treasure Seekers and its sequels by E. Nesbit. There is no real cause for parental concern; it is descriptive vocabulary rather than risky behaviour. If your teen uses it, context will usually make the intent clear. A short, curious question about where they heard it is usually all that is needed to know whether to follow up.

bastable means: The Bastables, characters in the 1899 novel The Story of the Treasure Seekers and its sequels by E. Nesbit. Register: neutral, standard English. A common learner mistake is using the word in a register it does not fit, or assuming a single global meaning; native speakers immediately notice when slang appears in formal contexts, so always check the surrounding register before producing it yourself.