Terms containing become lighter

Subject	English	Russian
Gruzovik	become lighter	облегчиться
gen.	become lighter	облегчаться
Gruzovik	become lighter	облегчаться
gen.	his hair became lighter in colour	волосы у него посветлели
math.	it was not until the internal combustion engine had been well developed that propulsion of lighter-than-air aircraft became feasible	только после того как
Makarov.	when air is warmed it expands and becomes lighter	когда воздух нагревается, он расширяется и становится легче