trend

(noun) A general direction in which something is developing; a fashion or craze. (verb) To develop in a general direction.

• trendy/ˈtrɛndi/(adj)流行的；时髦的
• trending/ˈtrɛndɪŋ/(adj)正在流行的（网络语境）

• current trend
• trend analysis
• upward trend
• downward trend
• emerging trend
• buck the trend
• trend toward
• set a trend

1. 1.All the data points toward a clear downward trend in customer satisfaction over the past 18 months.
2. 2.The company has bucked the industry trend by growing its workforce rather than cutting it.

• pattern/ˈpætən/— a regular and typical occurrence
• trajectory/trəˈdʒɛktəri/— the path something follows over time
• direction/dɪˈrɛkʃən/— the way things are developing

from Old English "trendan" = to revolve, roll — later came to mean moving in a general direction