Child Pays For Parent (CPFP)
CPFP (Child Pays For Parent) transaction is one where you pay a high fee to incentivize miners to also confirm the unconfirmed transaction from which you are drawing the inputs i.e. the parent transaction.
CPFP with Trezor in Electrum
It is possible to incentivize miners to confirm incoming transaction using Electrum app. For more information please read Electrum docs:
See also Replace-by-fee (RBF)