hangs by a thread (verb) risk: take a chance
Sinonime: advance,
age,
arrive, attain majority, become experienced, become wise,
bloom,
blossom, come of age,
culminate,
develop,
evolve, fill out,
flower*,
grow, grow up, maturate, mellow*, mushroom,
perfect, prime,
progress, reach adulthood, reach majority, ripen,
round,
season, settle down, shoot up
Antonime: be certain