Capable of happening.

Something that happens. / A spontaneous or improvised event, especially one that involves audience participation.

(slang, of a place) Busy, lively; vibrant, dynamic; fashionable. / (slang, of a person or product) Trendy, up-to-the-minute.

present participle of happen

plural of happening

(intransitive) To occur or take place. / (transitive, archaic) To happen to; to befall. / (intransitive or impersonal, with infinitive) To do or occur by chance or unexpectedly.

(obsolete or dialect) maybe, perhaps.

Third-person singular simple present indicative form of happen

simple past tense and past participle of happen

Worrying is not necessary, since it is common to make this mistake or for this to occur.