rely verb PHRASAL VERBS rely on/upon sb/sth
1 need sb/sth
ADV. heavily, a lot, strongly countries that rely heavily on food aid | entirely, exclusively, solely | increasingly | largely, mainly | traditionally
VERB + RELY be forced to, have to, must people who are forced to rely on public transport | tend to
PREP. for They relied entirely on these few weapons for their defence.
2 trust sb/sth
ADV. safely You can safely rely on his judgement. | simply Most historians simply rely on archives.
VERB + RELY can/could | can/could always | can/could no longer The party could no longer rely on its traditional supporters.
PREP. for I couldn't rely on John for information.
You can also check other dicts: rely (English, 中文解释 ), wordnet sense, Collins Definition