信息素

pheromone

letter / mail / CL:封[feng1] / to trust / to believe / to profess faith in / truthful / confidence / trust / at will / at random

information / news / message

breath / news / interest (on an investment or loan) / to cease / to stop / to rest / Taiwan pr. [xi2]

raw silk / white / plain, unadorned / vegetarian (food) / essence / nature / element / constituent / usually / always / ever

semiochemical