To make something the subject of a trend, or to cause something to trend or become fashionable.
From 'be-' plus 'trend,' from Old English 'trendan' meaning to turn or rotate. This is a modern coinage applying the ancient 'be-' prefix to a contemporary word.
The word 'trend' originally just meant a general direction or turning, but we've repurposed it for fashion and social media—and 'betrend' is how modern speakers creatively apply old English grammar patterns to new situations.
Complete word intelligence in one call. Free tier — 50 lookups/day.