Extremely loud and deep like thunder. Making a sound that resembles or suggests the rumbling of thunder.
From Old English 'thunor' (thunder) related to Germanic and Norse thunder gods like Thor. The suffix '-ous' from Latin creates the adjectival form. Thunder has been associated with divine power across cultures, influencing the word's connotations of awesome, overwhelming force.
Thunder is one of the few natural phenomena that gave its name to both a day of the week (Thursday, Thor's day) and a powerful adjective. The gap between seeing lightning and hearing thunder accidentally taught humans to measure distance - roughly one mile for every five seconds of delay.
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