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to stagnate; to be delayed; to be left undone
to be overdue (of a payment); to fall into arrears; to be outstanding
建設工事が資金不足により大幅に滞っている状況だ。
Construction is delayed due to lack of funds.
ローンの返済が滞り銀行から督促状が届いた。
Repayment was delayed and I received a reminder.
労使交渉が難航し契約更新の手続きが滞っている。
Negotiations are stagnant with no progress.